Remove the deprecated Handlers object (#8494)

All handlers now available via get_*_handler() methods on the HomeServer.

40 files changed, 116 insertions, 157 deletions

diff --git a/changelog.d/8494.misc b/changelog.d/8494.misc
new file mode 100644
index 0000000000..6e56c6b854
--- /dev/null
+++ b/changelog.d/8494.misc
@@ -0,0 +1 @@
+Remove the deprecated `Handlers` object.
diff --git a/synapse/app/admin_cmd.py b/synapse/app/admin_cmd.py
index f0d65d08d7..b4bd4d8e7a 100644
--- a/synapse/app/admin_cmd.py
+++ b/synapse/app/admin_cmd.py
@@ -89,7 +89,7 @@ async def export_data_command(hs, args):
     user_id = args.user_id
     directory = args.output_directory
 
-    res = await hs.get_handlers().admin_handler.export_user_data(
+    res = await hs.get_admin_handler().export_user_data(
         user_id, FileExfiltrationWriter(user_id, directory=directory)
     )
     print(res)
diff --git a/synapse/federation/federation_server.py b/synapse/federation/federation_server.py
index 1c7ea886c9..e8039e244c 100644
--- a/synapse/federation/federation_server.py
+++ b/synapse/federation/federation_server.py
@@ -99,10 +99,15 @@ class FederationServer(FederationBase):
         super().__init__(hs)
 
         self.auth = hs.get_auth()
-        self.handler = hs.get_handlers().federation_handler
+        self.handler = hs.get_federation_handler()
         self.state = hs.get_state_handler()
 
         self.device_handler = hs.get_device_handler()
+
+        # Ensure the following handlers are loaded since they register callbacks
+        # with FederationHandlerRegistry.
+        hs.get_directory_handler()
+
         self._federation_ratelimiter = hs.get_federation_ratelimiter()
 
         self._server_linearizer = Linearizer("fed_server")
diff --git a/synapse/handlers/__init__.py b/synapse/handlers/__init__.py
index 286f0054be..bfebb0f644 100644
--- a/synapse/handlers/__init__.py
+++ b/synapse/handlers/__init__.py
@@ -12,36 +12,3 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
-from .admin import AdminHandler
-from .directory import DirectoryHandler
-from .federation import FederationHandler
-from .identity import IdentityHandler
-from .search import SearchHandler
-
-
-class Handlers:
-
-    """ Deprecated. A collection of handlers.
-
-    At some point most of the classes whose name ended "Handler" were
-    accessed through this class.
-
-    However this makes it painful to unit test the handlers and to run cut
-    down versions of synapse that only use specific handlers because using a
-    single handler required creating all of the handlers. So some of the
-    handlers have been lifted out of the Handlers object and are now accessed
-    directly through the homeserver object itself.
-
-    Any new handlers should follow the new pattern of being accessed through
-    the homeserver object and should not be added to the Handlers object.
-
-    The remaining handlers should be moved out of the handlers object.
-    """
-
-    def __init__(self, hs):
-        self.federation_handler = FederationHandler(hs)
-        self.directory_handler = DirectoryHandler(hs)
-        self.admin_handler = AdminHandler(hs)
-        self.identity_handler = IdentityHandler(hs)
-        self.search_handler = SearchHandler(hs)
diff --git a/synapse/handlers/auth.py b/synapse/handlers/auth.py
index f6d17c53b1..1d1ddc2245 100644
--- a/synapse/handlers/auth.py
+++ b/synapse/handlers/auth.py
@@ -1080,7 +1080,7 @@ class AuthHandler(BaseHandler):
         if medium == "email":
             address = canonicalise_email(address)
 
-        identity_handler = self.hs.get_handlers().identity_handler
+        identity_handler = self.hs.get_identity_handler()
         result = await identity_handler.try_unbind_threepid(
             user_id, {"medium": medium, "address": address, "id_server": id_server}
         )
diff --git a/synapse/handlers/deactivate_account.py b/synapse/handlers/deactivate_account.py
index 72a5831531..58c9f12686 100644
--- a/synapse/handlers/deactivate_account.py
+++ b/synapse/handlers/deactivate_account.py
@@ -37,7 +37,7 @@ class DeactivateAccountHandler(BaseHandler):
         self._auth_handler = hs.get_auth_handler()
         self._device_handler = hs.get_device_handler()
         self._room_member_handler = hs.get_room_member_handler()
-        self._identity_handler = hs.get_handlers().identity_handler
+        self._identity_handler = hs.get_identity_handler()
         self.user_directory_handler = hs.get_user_directory_handler()
 
         # Flag that indicates whether the process to part users from rooms is running
diff --git a/synapse/handlers/message.py b/synapse/handlers/message.py
index 3e9a22e8f3..33d133a4b2 100644
--- a/synapse/handlers/message.py
+++ b/synapse/handlers/message.py
@@ -1014,7 +1014,7 @@ class EventCreationHandler:
 
             # Check the alias is currently valid (if it has changed).
             room_alias_str = event.content.get("alias", None)
-            directory_handler = self.hs.get_handlers().directory_handler
+            directory_handler = self.hs.get_directory_handler()
             if room_alias_str and room_alias_str != original_alias:
                 await self._validate_canonical_alias(
                     directory_handler, room_alias_str, event.room_id
@@ -1040,7 +1040,7 @@ class EventCreationHandler:
                         directory_handler, alias_str, event.room_id
                     )
 
-        federation_handler = self.hs.get_handlers().federation_handler
+        federation_handler = self.hs.get_federation_handler()
 
         if event.type == EventTypes.Member:
             if event.content["membership"] == Membership.INVITE:
diff --git a/synapse/handlers/pagination.py b/synapse/handlers/pagination.py
index 2c2a633938..085b685959 100644
--- a/synapse/handlers/pagination.py
+++ b/synapse/handlers/pagination.py
@@ -383,7 +383,7 @@ class PaginationHandler:
                             "room_key", leave_token
                         )
 
-                await self.hs.get_handlers().federation_handler.maybe_backfill(
+                await self.hs.get_federation_handler().maybe_backfill(
                     room_id, curr_topo, limit=pagin_config.limit,
                 )
 
diff --git a/synapse/handlers/register.py b/synapse/handlers/register.py
index 538f4b2a61..a6f1d21674 100644
--- a/synapse/handlers/register.py
+++ b/synapse/handlers/register.py
@@ -48,7 +48,7 @@ class RegistrationHandler(BaseHandler):
         self._auth_handler = hs.get_auth_handler()
         self.profile_handler = hs.get_profile_handler()
         self.user_directory_handler = hs.get_user_directory_handler()
-        self.identity_handler = self.hs.get_handlers().identity_handler
+        self.identity_handler = self.hs.get_identity_handler()
         self.ratelimiter = hs.get_registration_ratelimiter()
         self.macaroon_gen = hs.get_macaroon_generator()
         self._server_notices_mxid = hs.config.server_notices_mxid
diff --git a/synapse/handlers/room.py b/synapse/handlers/room.py
index d0530a446c..1d04d41e98 100644
--- a/synapse/handlers/room.py
+++ b/synapse/handlers/room.py
@@ -691,7 +691,7 @@ class RoomCreationHandler(BaseHandler):
         if not allowed_by_third_party_rules:
             raise SynapseError(403, "Room visibility value not allowed.")
 
-        directory_handler = self.hs.get_handlers().directory_handler
+        directory_handler = self.hs.get_directory_handler()
         if room_alias:
             await directory_handler.create_association(
                 requester=requester,
diff --git a/synapse/handlers/room_member.py b/synapse/handlers/room_member.py
index fd8114a64d..ffbc62ff44 100644
--- a/synapse/handlers/room_member.py
+++ b/synapse/handlers/room_member.py
@@ -64,9 +64,9 @@ class RoomMemberHandler(metaclass=abc.ABCMeta):
         self.state_handler = hs.get_state_handler()
         self.config = hs.config
 
-        self.federation_handler = hs.get_handlers().federation_handler
-        self.directory_handler = hs.get_handlers().directory_handler
-        self.identity_handler = hs.get_handlers().identity_handler
+        self.federation_handler = hs.get_federation_handler()
+        self.directory_handler = hs.get_directory_handler()
+        self.identity_handler = hs.get_identity_handler()
         self.registration_handler = hs.get_registration_handler()
         self.profile_handler = hs.get_profile_handler()
         self.event_creation_handler = hs.get_event_creation_handler()
diff --git a/synapse/handlers/ui_auth/checkers.py b/synapse/handlers/ui_auth/checkers.py
index 9146dc1a3b..3d66bf305e 100644
--- a/synapse/handlers/ui_auth/checkers.py
+++ b/synapse/handlers/ui_auth/checkers.py
@@ -143,7 +143,7 @@ class _BaseThreepidAuthChecker:
 
         threepid_creds = authdict["threepid_creds"]
 
-        identity_handler = self.hs.get_handlers().identity_handler
+        identity_handler = self.hs.get_identity_handler()
 
         logger.info("Getting validated threepid. threepidcreds: %r", (threepid_creds,))
 
diff --git a/synapse/replication/http/federation.py b/synapse/replication/http/federation.py
index 5393b9a9e7..b4f4a68b5c 100644
--- a/synapse/replication/http/federation.py
+++ b/synapse/replication/http/federation.py
@@ -62,7 +62,7 @@ class ReplicationFederationSendEventsRestServlet(ReplicationEndpoint):
         self.store = hs.get_datastore()
         self.storage = hs.get_storage()
         self.clock = hs.get_clock()
-        self.federation_handler = hs.get_handlers().federation_handler
+        self.federation_handler = hs.get_federation_handler()
 
     @staticmethod
     async def _serialize_payload(store, room_id, event_and_contexts, backfilled):
diff --git a/synapse/replication/http/membership.py b/synapse/replication/http/membership.py
index 30680baee8..e7cc74a5d2 100644
--- a/synapse/replication/http/membership.py
+++ b/synapse/replication/http/membership.py
@@ -47,7 +47,7 @@ class ReplicationRemoteJoinRestServlet(ReplicationEndpoint):
     def __init__(self, hs):
         super().__init__(hs)
 
-        self.federation_handler = hs.get_handlers().federation_handler
+        self.federation_handler = hs.get_federation_handler()
         self.store = hs.get_datastore()
         self.clock = hs.get_clock()
 
diff --git a/synapse/rest/admin/rooms.py b/synapse/rest/admin/rooms.py
index 09726d52d6..f5304ff43d 100644
--- a/synapse/rest/admin/rooms.py
+++ b/synapse/rest/admin/rooms.py
@@ -138,7 +138,7 @@ class ListRoomRestServlet(RestServlet):
     def __init__(self, hs):
         self.store = hs.get_datastore()
         self.auth = hs.get_auth()
-        self.admin_handler = hs.get_handlers().admin_handler
+        self.admin_handler = hs.get_admin_handler()
 
     async def on_GET(self, request):
         requester = await self.auth.get_user_by_req(request)
@@ -273,7 +273,7 @@ class JoinRoomAliasServlet(RestServlet):
         self.hs = hs
         self.auth = hs.get_auth()
         self.room_member_handler = hs.get_room_member_handler()
-        self.admin_handler = hs.get_handlers().admin_handler
+        self.admin_handler = hs.get_admin_handler()
         self.state_handler = hs.get_state_handler()
 
     async def on_POST(self, request, room_identifier):
diff --git a/synapse/rest/admin/users.py b/synapse/rest/admin/users.py
index 20dc1d0e05..8efefbc0a0 100644
--- a/synapse/rest/admin/users.py
+++ b/synapse/rest/admin/users.py
@@ -45,7 +45,7 @@ class UsersRestServlet(RestServlet):
         self.hs = hs
         self.store = hs.get_datastore()
         self.auth = hs.get_auth()
-        self.admin_handler = hs.get_handlers().admin_handler
+        self.admin_handler = hs.get_admin_handler()
 
     async def on_GET(self, request, user_id):
         target_user = UserID.from_string(user_id)
@@ -82,7 +82,7 @@ class UsersRestServletV2(RestServlet):
         self.hs = hs
         self.store = hs.get_datastore()
         self.auth = hs.get_auth()
-        self.admin_handler = hs.get_handlers().admin_handler
+        self.admin_handler = hs.get_admin_handler()
 
     async def on_GET(self, request):
         await assert_requester_is_admin(self.auth, request)
@@ -135,7 +135,7 @@ class UserRestServletV2(RestServlet):
     def __init__(self, hs):
         self.hs = hs
         self.auth = hs.get_auth()
-        self.admin_handler = hs.get_handlers().admin_handler
+        self.admin_handler = hs.get_admin_handler()
         self.store = hs.get_datastore()
         self.auth_handler = hs.get_auth_handler()
         self.profile_handler = hs.get_profile_handler()
@@ -448,7 +448,7 @@ class WhoisRestServlet(RestServlet):
     def __init__(self, hs):
         self.hs = hs
         self.auth = hs.get_auth()
-        self.handlers = hs.get_handlers()
+        self.admin_handler = hs.get_admin_handler()
 
     async def on_GET(self, request, user_id):
         target_user = UserID.from_string(user_id)
@@ -461,7 +461,7 @@ class WhoisRestServlet(RestServlet):
         if not self.hs.is_mine(target_user):
             raise SynapseError(400, "Can only whois a local user")
 
-        ret = await self.handlers.admin_handler.get_whois(target_user)
+        ret = await self.admin_handler.get_whois(target_user)
 
         return 200, ret
 
@@ -591,7 +591,6 @@ class SearchUsersRestServlet(RestServlet):
         self.hs = hs
         self.store = hs.get_datastore()
         self.auth = hs.get_auth()
-        self.handlers = hs.get_handlers()
 
     async def on_GET(self, request, target_user_id):
         """Get request to search user table for specific users according to
@@ -612,7 +611,7 @@ class SearchUsersRestServlet(RestServlet):
         term = parse_string(request, "term", required=True)
         logger.info("term: %s ", term)
 
-        ret = await self.handlers.store.search_users(term)
+        ret = await self.store.search_users(term)
         return 200, ret
 
 
diff --git a/synapse/rest/client/v1/directory.py b/synapse/rest/client/v1/directory.py
index faabeeb91c..e5af26b176 100644
--- a/synapse/rest/client/v1/directory.py
+++ b/synapse/rest/client/v1/directory.py
@@ -42,14 +42,13 @@ class ClientDirectoryServer(RestServlet):
     def __init__(self, hs):
         super().__init__()
         self.store = hs.get_datastore()
-        self.handlers = hs.get_handlers()
+        self.directory_handler = hs.get_directory_handler()
         self.auth = hs.get_auth()
 
     async def on_GET(self, request, room_alias):
         room_alias = RoomAlias.from_string(room_alias)
 
-        dir_handler = self.handlers.directory_handler
-        res = await dir_handler.get_association(room_alias)
+        res = await self.directory_handler.get_association(room_alias)
 
         return 200, res
 
@@ -79,19 +78,19 @@ class ClientDirectoryServer(RestServlet):
 
         requester = await self.auth.get_user_by_req(request)
 
-        await self.handlers.directory_handler.create_association(
+        await self.directory_handler.create_association(
             requester, room_alias, room_id, servers
         )
 
         return 200, {}
 
     async def on_DELETE(self, request, room_alias):
-        dir_handler = self.handlers.directory_handler
-
         try:
             service = self.auth.get_appservice_by_req(request)
             room_alias = RoomAlias.from_string(room_alias)
-            await dir_handler.delete_appservice_association(service, room_alias)
+            await self.directory_handler.delete_appservice_association(
+                service, room_alias
+            )
             logger.info(
                 "Application service at %s deleted alias %s",
                 service.url,
@@ -107,7 +106,7 @@ class ClientDirectoryServer(RestServlet):
 
         room_alias = RoomAlias.from_string(room_alias)
 
-        await dir_handler.delete_association(requester, room_alias)
+        await self.directory_handler.delete_association(requester, room_alias)
 
         logger.info(
             "User %s deleted alias %s", user.to_string(), room_alias.to_string()
@@ -122,7 +121,7 @@ class ClientDirectoryListServer(RestServlet):
     def __init__(self, hs):
         super().__init__()
         self.store = hs.get_datastore()
-        self.handlers = hs.get_handlers()
+        self.directory_handler = hs.get_directory_handler()
         self.auth = hs.get_auth()
 
     async def on_GET(self, request, room_id):
@@ -138,7 +137,7 @@ class ClientDirectoryListServer(RestServlet):
         content = parse_json_object_from_request(request)
         visibility = content.get("visibility", "public")
 
-        await self.handlers.directory_handler.edit_published_room_list(
+        await self.directory_handler.edit_published_room_list(
             requester, room_id, visibility
         )
 
@@ -147,7 +146,7 @@ class ClientDirectoryListServer(RestServlet):
     async def on_DELETE(self, request, room_id):
         requester = await self.auth.get_user_by_req(request)
 
-        await self.handlers.directory_handler.edit_published_room_list(
+        await self.directory_handler.edit_published_room_list(
             requester, room_id, "private"
         )
 
@@ -162,7 +161,7 @@ class ClientAppserviceDirectoryListServer(RestServlet):
     def __init__(self, hs):
         super().__init__()
         self.store = hs.get_datastore()
-        self.handlers = hs.get_handlers()
+        self.directory_handler = hs.get_directory_handler()
         self.auth = hs.get_auth()
 
     def on_PUT(self, request, network_id, room_id):
@@ -180,7 +179,7 @@ class ClientAppserviceDirectoryListServer(RestServlet):
                 403, "Only appservices can edit the appservice published room list"
             )
 
-        await self.handlers.directory_handler.edit_published_appservice_room_list(
+        await self.directory_handler.edit_published_appservice_room_list(
             requester.app_service.id, network_id, room_id, visibility
         )
 
diff --git a/synapse/rest/client/v1/login.py b/synapse/rest/client/v1/login.py
index 3d1693d7ac..d7deb9300d 100644
--- a/synapse/rest/client/v1/login.py
+++ b/synapse/rest/client/v1/login.py
@@ -67,7 +67,6 @@ class LoginRestServlet(RestServlet):
 
         self.auth_handler = self.hs.get_auth_handler()
         self.registration_handler = hs.get_registration_handler()
-        self.handlers = hs.get_handlers()
         self._well_known_builder = WellKnownBuilder(hs)
         self._address_ratelimiter = Ratelimiter(
             clock=hs.get_clock(),
diff --git a/synapse/rest/client/v1/room.py b/synapse/rest/client/v1/room.py
index b63389e5fe..00b4397082 100644
--- a/synapse/rest/client/v1/room.py
+++ b/synapse/rest/client/v1/room.py
@@ -112,7 +112,6 @@ class RoomCreateRestServlet(TransactionRestServlet):
 class RoomStateEventRestServlet(TransactionRestServlet):
     def __init__(self, hs):
         super().__init__(hs)
-        self.handlers = hs.get_handlers()
         self.event_creation_handler = hs.get_event_creation_handler()
         self.room_member_handler = hs.get_room_member_handler()
         self.message_handler = hs.get_message_handler()
@@ -798,7 +797,6 @@ class RoomMembershipRestServlet(TransactionRestServlet):
 class RoomRedactEventRestServlet(TransactionRestServlet):
     def __init__(self, hs):
         super().__init__(hs)
-        self.handlers = hs.get_handlers()
         self.event_creation_handler = hs.get_event_creation_handler()
         self.auth = hs.get_auth()
 
@@ -903,7 +901,7 @@ class RoomAliasListServlet(RestServlet):
     def __init__(self, hs: "synapse.server.HomeServer"):
         super().__init__()
         self.auth = hs.get_auth()
-        self.directory_handler = hs.get_handlers().directory_handler
+        self.directory_handler = hs.get_directory_handler()
 
     async def on_GET(self, request, room_id):
         requester = await self.auth.get_user_by_req(request)
@@ -920,7 +918,7 @@ class SearchRestServlet(RestServlet):
 
     def __init__(self, hs):
         super().__init__()
-        self.handlers = hs.get_handlers()
+        self.search_handler = hs.get_search_handler()
         self.auth = hs.get_auth()
 
     async def on_POST(self, request):
@@ -929,9 +927,7 @@ class SearchRestServlet(RestServlet):
         content = parse_json_object_from_request(request)
 
         batch = parse_string(request, "next_batch")
-        results = await self.handlers.search_handler.search(
-            requester.user, content, batch
-        )
+        results = await self.search_handler.search(requester.user, content, batch)
 
         return 200, results
 
diff --git a/synapse/rest/client/v2_alpha/account.py b/synapse/rest/client/v2_alpha/account.py
index ab5815e7f7..e857cff176 100644
--- a/synapse/rest/client/v2_alpha/account.py
+++ b/synapse/rest/client/v2_alpha/account.py
@@ -56,7 +56,7 @@ class EmailPasswordRequestTokenRestServlet(RestServlet):
         self.hs = hs
         self.datastore = hs.get_datastore()
         self.config = hs.config
-        self.identity_handler = hs.get_handlers().identity_handler
+        self.identity_handler = hs.get_identity_handler()
 
         if self.config.threepid_behaviour_email == ThreepidBehaviour.LOCAL:
             self.mailer = Mailer(
@@ -327,7 +327,7 @@ class EmailThreepidRequestTokenRestServlet(RestServlet):
         super().__init__()
         self.hs = hs
         self.config = hs.config
-        self.identity_handler = hs.get_handlers().identity_handler
+        self.identity_handler = hs.get_identity_handler()
         self.store = self.hs.get_datastore()
 
         if self.config.threepid_behaviour_email == ThreepidBehaviour.LOCAL:
@@ -424,7 +424,7 @@ class MsisdnThreepidRequestTokenRestServlet(RestServlet):
         self.hs = hs
         super().__init__()
         self.store = self.hs.get_datastore()
-        self.identity_handler = hs.get_handlers().identity_handler
+        self.identity_handler = hs.get_identity_handler()
 
     async def on_POST(self, request):
         body = parse_json_object_from_request(request)
@@ -574,7 +574,7 @@ class AddThreepidMsisdnSubmitTokenServlet(RestServlet):
         self.config = hs.config
         self.clock = hs.get_clock()
         self.store = hs.get_datastore()
-        self.identity_handler = hs.get_handlers().identity_handler
+        self.identity_handler = hs.get_identity_handler()
 
     async def on_POST(self, request):
         if not self.config.account_threepid_delegate_msisdn:
@@ -604,7 +604,7 @@ class ThreepidRestServlet(RestServlet):
     def __init__(self, hs):
         super().__init__()
         self.hs = hs
-        self.identity_handler = hs.get_handlers().identity_handler
+        self.identity_handler = hs.get_identity_handler()
         self.auth = hs.get_auth()
         self.auth_handler = hs.get_auth_handler()
         self.datastore = self.hs.get_datastore()
@@ -660,7 +660,7 @@ class ThreepidAddRestServlet(RestServlet):
     def __init__(self, hs):
         super().__init__()
         self.hs = hs
-        self.identity_handler = hs.get_handlers().identity_handler
+        self.identity_handler = hs.get_identity_handler()
         self.auth = hs.get_auth()
         self.auth_handler = hs.get_auth_handler()
 
@@ -711,7 +711,7 @@ class ThreepidBindRestServlet(RestServlet):
     def __init__(self, hs):
         super().__init__()
         self.hs = hs
-        self.identity_handler = hs.get_handlers().identity_handler
+        self.identity_handler = hs.get_identity_handler()
         self.auth = hs.get_auth()
 
     async def on_POST(self, request):
@@ -740,7 +740,7 @@ class ThreepidUnbindRestServlet(RestServlet):
     def __init__(self, hs):
         super().__init__()
         self.hs = hs
-        self.identity_handler = hs.get_handlers().identity_handler
+        self.identity_handler = hs.get_identity_handler()
         self.auth = hs.get_auth()
         self.datastore = self.hs.get_datastore()
 
diff --git a/synapse/rest/client/v2_alpha/register.py b/synapse/rest/client/v2_alpha/register.py
index ffa2dfce42..395b6a82a9 100644
--- a/synapse/rest/client/v2_alpha/register.py
+++ b/synapse/rest/client/v2_alpha/register.py
@@ -78,7 +78,7 @@ class EmailRegisterRequestTokenRestServlet(RestServlet):
         """
         super().__init__()
         self.hs = hs
-        self.identity_handler = hs.get_handlers().identity_handler
+        self.identity_handler = hs.get_identity_handler()
         self.config = hs.config
 
         if self.hs.config.threepid_behaviour_email == ThreepidBehaviour.LOCAL:
@@ -176,7 +176,7 @@ class MsisdnRegisterRequestTokenRestServlet(RestServlet):
         """
         super().__init__()
         self.hs = hs
-        self.identity_handler = hs.get_handlers().identity_handler
+        self.identity_handler = hs.get_identity_handler()
 
     async def on_POST(self, request):
         body = parse_json_object_from_request(request)
@@ -370,7 +370,7 @@ class RegisterRestServlet(RestServlet):
         self.store = hs.get_datastore()
         self.auth_handler = hs.get_auth_handler()
         self.registration_handler = hs.get_registration_handler()
-        self.identity_handler = hs.get_handlers().identity_handler
+        self.identity_handler = hs.get_identity_handler()
         self.room_member_handler = hs.get_room_member_handler()
         self.macaroon_gen = hs.get_macaroon_generator()
         self.ratelimiter = hs.get_registration_ratelimiter()
diff --git a/synapse/server.py b/synapse/server.py
index f83dd6148c..e793793cdc 100644
--- a/synapse/server.py
+++ b/synapse/server.py
@@ -54,19 +54,22 @@ from synapse.federation.sender import FederationSender
 from synapse.federation.transport.client import TransportLayerClient
 from synapse.groups.attestations import GroupAttestationSigning, GroupAttestionRenewer
 from synapse.groups.groups_server import GroupsServerHandler, GroupsServerWorkerHandler
-from synapse.handlers import Handlers
 from synapse.handlers.account_validity import AccountValidityHandler
 from synapse.handlers.acme import AcmeHandler
+from synapse.handlers.admin import AdminHandler
 from synapse.handlers.appservice import ApplicationServicesHandler
 from synapse.handlers.auth import AuthHandler, MacaroonGenerator
 from synapse.handlers.cas_handler import CasHandler
 from synapse.handlers.deactivate_account import DeactivateAccountHandler
 from synapse.handlers.device import DeviceHandler, DeviceWorkerHandler
 from synapse.handlers.devicemessage import DeviceMessageHandler
+from synapse.handlers.directory import DirectoryHandler
 from synapse.handlers.e2e_keys import E2eKeysHandler
 from synapse.handlers.e2e_room_keys import E2eRoomKeysHandler
 from synapse.handlers.events import EventHandler, EventStreamHandler
+from synapse.handlers.federation import FederationHandler
 from synapse.handlers.groups_local import GroupsLocalHandler, GroupsLocalWorkerHandler
+from synapse.handlers.identity import IdentityHandler
 from synapse.handlers.initial_sync import InitialSyncHandler
 from synapse.handlers.message import EventCreationHandler, MessageHandler
 from synapse.handlers.pagination import PaginationHandler
@@ -84,6 +87,7 @@ from synapse.handlers.room import (
 from synapse.handlers.room_list import RoomListHandler
 from synapse.handlers.room_member import RoomMemberMasterHandler
 from synapse.handlers.room_member_worker import RoomMemberWorkerHandler
+from synapse.handlers.search import SearchHandler
 from synapse.handlers.set_password import SetPasswordHandler
 from synapse.handlers.stats import StatsHandler
 from synapse.handlers.sync import SyncHandler
@@ -319,10 +323,6 @@ class HomeServer(metaclass=abc.ABCMeta):
         return FederationServer(self)
 
     @cache_in_self
-    def get_handlers(self) -> Handlers:
-        return Handlers(self)
-
-    @cache_in_self
     def get_notifier(self) -> Notifier:
         return Notifier(self)
 
@@ -409,6 +409,10 @@ class HomeServer(metaclass=abc.ABCMeta):
         return DeviceMessageHandler(self)
 
     @cache_in_self
+    def get_directory_handler(self) -> DirectoryHandler:
+        return DirectoryHandler(self)
+
+    @cache_in_self
     def get_e2e_keys_handler(self) -> E2eKeysHandler:
         return E2eKeysHandler(self)
 
@@ -421,6 +425,10 @@ class HomeServer(metaclass=abc.ABCMeta):
         return AcmeHandler(self)
 
     @cache_in_self
+    def get_admin_handler(self) -> AdminHandler:
+        return AdminHandler(self)
+
+    @cache_in_self
     def get_application_service_api(self) -> ApplicationServiceApi:
         return ApplicationServiceApi(self)
 
@@ -441,6 +449,14 @@ class HomeServer(metaclass=abc.ABCMeta):
         return EventStreamHandler(self)
 
     @cache_in_self
+    def get_federation_handler(self) -> FederationHandler:
+        return FederationHandler(self)
+
+    @cache_in_self
+    def get_identity_handler(self) -> IdentityHandler:
+        return IdentityHandler(self)
+
+    @cache_in_self
     def get_initial_sync_handler(self) -> InitialSyncHandler:
         return InitialSyncHandler(self)
 
@@ -460,6 +476,10 @@ class HomeServer(metaclass=abc.ABCMeta):
         return DeactivateAccountHandler(self)
 
     @cache_in_self
+    def get_search_handler(self) -> SearchHandler:
+        return SearchHandler(self)
+
+    @cache_in_self
     def get_set_password_handler(self) -> SetPasswordHandler:
         return SetPasswordHandler(self)
 
diff --git a/tests/api/test_auth.py b/tests/api/test_auth.py
index 8ab56ec94c..cb6f29d670 100644
--- a/tests/api/test_auth.py
+++ b/tests/api/test_auth.py
@@ -19,7 +19,6 @@ import pymacaroons
 
 from twisted.internet import defer
 
-import synapse.handlers.auth
 from synapse.api.auth import Auth
 from synapse.api.constants import UserTypes
 from synapse.api.errors import (
@@ -36,20 +35,15 @@ from tests import unittest
 from tests.utils import mock_getRawHeaders, setup_test_homeserver
 
 
-class TestHandlers:
-    def __init__(self, hs):
-        self.auth_handler = synapse.handlers.auth.AuthHandler(hs)
-
-
 class AuthTestCase(unittest.TestCase):
     @defer.inlineCallbacks
     def setUp(self):
         self.state_handler = Mock()
         self.store = Mock()
 
-        self.hs = yield setup_test_homeserver(self.addCleanup, handlers=None)
+        self.hs = yield setup_test_homeserver(self.addCleanup)
         self.hs.get_datastore = Mock(return_value=self.store)
-        self.hs.handlers = TestHandlers(self.hs)
+        self.hs.get_auth_handler().store = self.store
         self.auth = Auth(self.hs)
 
         # AuthBlocking reads from the hs' config on initialization. We need to
@@ -283,7 +277,7 @@ class AuthTestCase(unittest.TestCase):
         self.store.get_device = Mock(return_value=defer.succeed(None))
 
         token = yield defer.ensureDeferred(
-            self.hs.handlers.auth_handler.get_access_token_for_user_id(
+            self.hs.get_auth_handler().get_access_token_for_user_id(
                 USER_ID, "DEVICE", valid_until_ms=None
             )
         )
diff --git a/tests/api/test_filtering.py b/tests/api/test_filtering.py
index d2d535d23c..c98ae75974 100644
--- a/tests/api/test_filtering.py
+++ b/tests/api/test_filtering.py
@@ -50,10 +50,7 @@ class FilteringTestCase(unittest.TestCase):
         self.mock_http_client.put_json = DeferredMockCallable()
 
         hs = yield setup_test_homeserver(
-            self.addCleanup,
-            handlers=None,
-            http_client=self.mock_http_client,
-            keyring=Mock(),
+            self.addCleanup, http_client=self.mock_http_client, keyring=Mock(),
         )
 
         self.filtering = hs.get_filtering()
diff --git a/tests/crypto/test_keyring.py b/tests/crypto/test_keyring.py
index 8ff1460c0d..697916a019 100644
--- a/tests/crypto/test_keyring.py
+++ b/tests/crypto/test_keyring.py
@@ -315,7 +315,7 @@ class KeyringTestCase(unittest.HomeserverTestCase):
 class ServerKeyFetcherTestCase(unittest.HomeserverTestCase):
     def make_homeserver(self, reactor, clock):
         self.http_client = Mock()
-        hs = self.setup_test_homeserver(handlers=None, http_client=self.http_client)
+        hs = self.setup_test_homeserver(http_client=self.http_client)
         return hs
 
     def test_get_keys_from_server(self):
@@ -395,9 +395,7 @@ class PerspectivesKeyFetcherTestCase(unittest.HomeserverTestCase):
             }
         ]
 
-        return self.setup_test_homeserver(
-            handlers=None, http_client=self.http_client, config=config
-        )
+        return self.setup_test_homeserver(http_client=self.http_client, config=config)
 
     def build_perspectives_response(
         self, server_name: str, signing_key: SigningKey, valid_until_ts: int,
diff --git a/tests/handlers/test_admin.py b/tests/handlers/test_admin.py
index fc37c4328c..5c2b4de1a6 100644
--- a/tests/handlers/test_admin.py
+++ b/tests/handlers/test_admin.py
@@ -35,7 +35,7 @@ class ExfiltrateData(unittest.HomeserverTestCase):
     ]
 
     def prepare(self, reactor, clock, hs):
-        self.admin_handler = hs.get_handlers().admin_handler
+        self.admin_handler = hs.get_admin_handler()
 
         self.user1 = self.register_user("user1", "password")
         self.token1 = self.login("user1", "password")
diff --git a/tests/handlers/test_auth.py b/tests/handlers/test_auth.py
index 97877c2e42..b5055e018c 100644
--- a/tests/handlers/test_auth.py
+++ b/tests/handlers/test_auth.py
@@ -21,24 +21,17 @@ from twisted.internet import defer
 import synapse
 import synapse.api.errors
 from synapse.api.errors import ResourceLimitError
-from synapse.handlers.auth import AuthHandler
 
 from tests import unittest
 from tests.test_utils import make_awaitable
 from tests.utils import setup_test_homeserver
 
 
-class AuthHandlers:
-    def __init__(self, hs):
-        self.auth_handler = AuthHandler(hs)
-
-
 class AuthTestCase(unittest.TestCase):
     @defer.inlineCallbacks
     def setUp(self):
-        self.hs = yield setup_test_homeserver(self.addCleanup, handlers=None)
-        self.hs.handlers = AuthHandlers(self.hs)
-        self.auth_handler = self.hs.handlers.auth_handler
+        self.hs = yield setup_test_homeserver(self.addCleanup)
+        self.auth_handler = self.hs.get_auth_handler()
         self.macaroon_generator = self.hs.get_macaroon_generator()
 
         # MAU tests
diff --git a/tests/handlers/test_directory.py b/tests/handlers/test_directory.py
index bc0c5aefdc..2ce6dc9528 100644
--- a/tests/handlers/test_directory.py
+++ b/tests/handlers/test_directory.py
@@ -48,7 +48,7 @@ class DirectoryTestCase(unittest.HomeserverTestCase):
             federation_registry=self.mock_registry,
         )
 
-        self.handler = hs.get_handlers().directory_handler
+        self.handler = hs.get_directory_handler()
 
         self.store = hs.get_datastore()
 
@@ -110,7 +110,7 @@ class TestCreateAlias(unittest.HomeserverTestCase):
     ]
 
     def prepare(self, reactor, clock, hs):
-        self.handler = hs.get_handlers().directory_handler
+        self.handler = hs.get_directory_handler()
 
         # Create user
         self.admin_user = self.register_user("admin", "pass", admin=True)
@@ -173,7 +173,7 @@ class TestDeleteAlias(unittest.HomeserverTestCase):
 
     def prepare(self, reactor, clock, hs):
         self.store = hs.get_datastore()
-        self.handler = hs.get_handlers().directory_handler
+        self.handler = hs.get_directory_handler()
         self.state_handler = hs.get_state_handler()
 
         # Create user
@@ -289,7 +289,7 @@ class CanonicalAliasTestCase(unittest.HomeserverTestCase):
 
     def prepare(self, reactor, clock, hs):
         self.store = hs.get_datastore()
-        self.handler = hs.get_handlers().directory_handler
+        self.handler = hs.get_directory_handler()
         self.state_handler = hs.get_state_handler()
 
         # Create user
@@ -442,7 +442,7 @@ class TestRoomListSearchDisabled(unittest.HomeserverTestCase):
         self.assertEquals(200, channel.code, channel.result)
 
         self.room_list_handler = hs.get_room_list_handler()
-        self.directory_handler = hs.get_handlers().directory_handler
+        self.directory_handler = hs.get_directory_handler()
 
         return hs
 
diff --git a/tests/handlers/test_e2e_keys.py b/tests/handlers/test_e2e_keys.py
index e79d612f7a..924f29f051 100644
--- a/tests/handlers/test_e2e_keys.py
+++ b/tests/handlers/test_e2e_keys.py
@@ -38,7 +38,7 @@ class E2eKeysHandlerTestCase(unittest.TestCase):
     @defer.inlineCallbacks
     def setUp(self):
         self.hs = yield utils.setup_test_homeserver(
-            self.addCleanup, handlers=None, federation_client=mock.Mock()
+            self.addCleanup, federation_client=mock.Mock()
         )
         self.handler = synapse.handlers.e2e_keys.E2eKeysHandler(self.hs)
         self.store = self.hs.get_datastore()
diff --git a/tests/handlers/test_e2e_room_keys.py b/tests/handlers/test_e2e_room_keys.py
index 7adde9b9de..45f201a399 100644
--- a/tests/handlers/test_e2e_room_keys.py
+++ b/tests/handlers/test_e2e_room_keys.py
@@ -54,7 +54,7 @@ class E2eRoomKeysHandlerTestCase(unittest.TestCase):
     @defer.inlineCallbacks
     def setUp(self):
         self.hs = yield utils.setup_test_homeserver(
-            self.addCleanup, handlers=None, replication_layer=mock.Mock()
+            self.addCleanup, replication_layer=mock.Mock()
         )
         self.handler = synapse.handlers.e2e_room_keys.E2eRoomKeysHandler(self.hs)
         self.local_user = "@boris:" + self.hs.hostname
diff --git a/tests/handlers/test_federation.py b/tests/handlers/test_federation.py
index 96fea58673..9ef80fe502 100644
--- a/tests/handlers/test_federation.py
+++ b/tests/handlers/test_federation.py
@@ -38,7 +38,7 @@ class FederationTestCase(unittest.HomeserverTestCase):
 
     def make_homeserver(self, reactor, clock):
         hs = self.setup_test_homeserver(http_client=None)
-        self.handler = hs.get_handlers().federation_handler
+        self.handler = hs.get_federation_handler()
         self.store = hs.get_datastore()
         return hs
 
diff --git a/tests/handlers/test_presence.py b/tests/handlers/test_presence.py
index 306dcfe944..914c82e7a8 100644
--- a/tests/handlers/test_presence.py
+++ b/tests/handlers/test_presence.py
@@ -470,7 +470,7 @@ class PresenceJoinTestCase(unittest.HomeserverTestCase):
     def prepare(self, reactor, clock, hs):
         self.federation_sender = hs.get_federation_sender()
         self.event_builder_factory = hs.get_event_builder_factory()
-        self.federation_handler = hs.get_handlers().federation_handler
+        self.federation_handler = hs.get_federation_handler()
         self.presence_handler = hs.get_presence_handler()
 
         # self.event_builder_for_2 = EventBuilderFactory(hs)
diff --git a/tests/handlers/test_profile.py b/tests/handlers/test_profile.py
index 8e95e53d9e..a69fa28b41 100644
--- a/tests/handlers/test_profile.py
+++ b/tests/handlers/test_profile.py
@@ -20,7 +20,6 @@ from twisted.internet import defer
 
 import synapse.types
 from synapse.api.errors import AuthError, SynapseError
-from synapse.handlers.profile import MasterProfileHandler
 from synapse.types import UserID
 
 from tests import unittest
@@ -28,11 +27,6 @@ from tests.test_utils import make_awaitable
 from tests.utils import setup_test_homeserver
 
 
-class ProfileHandlers:
-    def __init__(self, hs):
-        self.profile_handler = MasterProfileHandler(hs)
-
-
 class ProfileTestCase(unittest.TestCase):
     """ Tests profile management. """
 
@@ -51,7 +45,6 @@ class ProfileTestCase(unittest.TestCase):
         hs = yield setup_test_homeserver(
             self.addCleanup,
             http_client=None,
-            handlers=None,
             resource_for_federation=Mock(),
             federation_client=self.mock_federation,
             federation_server=Mock(),
diff --git a/tests/handlers/test_register.py b/tests/handlers/test_register.py
index 702c6aa089..bdf3d0a8a2 100644
--- a/tests/handlers/test_register.py
+++ b/tests/handlers/test_register.py
@@ -18,7 +18,6 @@ from mock import Mock
 from synapse.api.auth import Auth
 from synapse.api.constants import UserTypes
 from synapse.api.errors import Codes, ResourceLimitError, SynapseError
-from synapse.handlers.register import RegistrationHandler
 from synapse.spam_checker_api import RegistrationBehaviour
 from synapse.types import RoomAlias, UserID, create_requester
 
@@ -29,11 +28,6 @@ from tests.utils import mock_getRawHeaders
 from .. import unittest
 
 
-class RegistrationHandlers:
-    def __init__(self, hs):
-        self.registration_handler = RegistrationHandler(hs)
-
-
 class RegistrationTestCase(unittest.HomeserverTestCase):
     """ Tests the RegistrationHandler. """
 
@@ -154,7 +148,7 @@ class RegistrationTestCase(unittest.HomeserverTestCase):
         room_alias_str = "#room:test"
         user_id = self.get_success(self.handler.register_user(localpart="jeff"))
         rooms = self.get_success(self.store.get_rooms_for_user(user_id))
-        directory_handler = self.hs.get_handlers().directory_handler
+        directory_handler = self.hs.get_directory_handler()
         room_alias = RoomAlias.from_string(room_alias_str)
         room_id = self.get_success(directory_handler.get_association(room_alias))
 
@@ -193,7 +187,7 @@ class RegistrationTestCase(unittest.HomeserverTestCase):
         user_id = self.get_success(self.handler.register_user(localpart="support"))
         rooms = self.get_success(self.store.get_rooms_for_user(user_id))
         self.assertEqual(len(rooms), 0)
-        directory_handler = self.hs.get_handlers().directory_handler
+        directory_handler = self.hs.get_directory_handler()
         room_alias = RoomAlias.from_string(room_alias_str)
         self.get_failure(directory_handler.get_association(room_alias), SynapseError)
 
@@ -205,7 +199,7 @@ class RegistrationTestCase(unittest.HomeserverTestCase):
         self.store.is_real_user = Mock(return_value=make_awaitable(True))
         user_id = self.get_success(self.handler.register_user(localpart="real"))
         rooms = self.get_success(self.store.get_rooms_for_user(user_id))
-        directory_handler = self.hs.get_handlers().directory_handler
+        directory_handler = self.hs.get_directory_handler()
         room_alias = RoomAlias.from_string(room_alias_str)
         room_id = self.get_success(directory_handler.get_association(room_alias))
 
@@ -237,7 +231,7 @@ class RegistrationTestCase(unittest.HomeserverTestCase):
         user_id = self.get_success(self.handler.register_user(localpart="jeff"))
 
         # Ensure the room was created.
-        directory_handler = self.hs.get_handlers().directory_handler
+        directory_handler = self.hs.get_directory_handler()
         room_alias = RoomAlias.from_string(room_alias_str)
         room_id = self.get_success(directory_handler.get_association(room_alias))
 
@@ -266,7 +260,7 @@ class RegistrationTestCase(unittest.HomeserverTestCase):
         user_id = self.get_success(self.handler.register_user(localpart="jeff"))
 
         # Ensure the room was created.
-        directory_handler = self.hs.get_handlers().directory_handler
+        directory_handler = self.hs.get_directory_handler()
         room_alias = RoomAlias.from_string(room_alias_str)
         room_id = self.get_success(directory_handler.get_association(room_alias))
 
@@ -304,7 +298,7 @@ class RegistrationTestCase(unittest.HomeserverTestCase):
         user_id = self.get_success(self.handler.register_user(localpart="jeff"))
 
         # Ensure the room was created.
-        directory_handler = self.hs.get_handlers().directory_handler
+        directory_handler = self.hs.get_directory_handler()
         room_alias = RoomAlias.from_string(room_alias_str)
         room_id = self.get_success(directory_handler.get_association(room_alias))
 
@@ -347,7 +341,7 @@ class RegistrationTestCase(unittest.HomeserverTestCase):
         )
 
         # Ensure the room was created.
-        directory_handler = self.hs.get_handlers().directory_handler
+        directory_handler = self.hs.get_directory_handler()
         room_alias = RoomAlias.from_string(room_alias_str)
         room_id = self.get_success(directory_handler.get_association(room_alias))
 
@@ -384,7 +378,7 @@ class RegistrationTestCase(unittest.HomeserverTestCase):
         user_id = self.get_success(self.handler.register_user(localpart="jeff"))
 
         # Ensure the room was created.
-        directory_handler = self.hs.get_handlers().directory_handler
+        directory_handler = self.hs.get_directory_handler()
         room_alias = RoomAlias.from_string(room_alias_str)
         room_id = self.get_success(directory_handler.get_association(room_alias))
 
diff --git a/tests/replication/test_federation_sender_shard.py b/tests/replication/test_federation_sender_shard.py
index 1d7edee5ba..9c4a9c3563 100644
--- a/tests/replication/test_federation_sender_shard.py
+++ b/tests/replication/test_federation_sender_shard.py
@@ -207,7 +207,7 @@ class FederationSenderTestCase(BaseMultiWorkerStreamTestCase):
     def create_room_with_remote_server(self, user, token, remote_server="other_server"):
         room = self.helper.create_room_as(user, tok=token)
         store = self.hs.get_datastore()
-        federation = self.hs.get_handlers().federation_handler
+        federation = self.hs.get_federation_handler()
 
         prev_event_ids = self.get_success(store.get_latest_event_ids_in_room(room))
         room_version = self.get_success(store.get_room_version(room))
diff --git a/tests/rest/client/test_shadow_banned.py b/tests/rest/client/test_shadow_banned.py
index dfe4bf7762..6bb02b9630 100644
--- a/tests/rest/client/test_shadow_banned.py
+++ b/tests/rest/client/test_shadow_banned.py
@@ -78,7 +78,7 @@ class RoomTestCase(_ShadowBannedBase):
 
     def test_invite_3pid(self):
         """Ensure that a 3PID invite does not attempt to contact the identity server."""
-        identity_handler = self.hs.get_handlers().identity_handler
+        identity_handler = self.hs.get_identity_handler()
         identity_handler.lookup_3pid = Mock(
             side_effect=AssertionError("This should not get called")
         )
diff --git a/tests/rest/client/v1/test_events.py b/tests/rest/client/v1/test_events.py
index f75520877f..3397ba5579 100644
--- a/tests/rest/client/v1/test_events.py
+++ b/tests/rest/client/v1/test_events.py
@@ -42,7 +42,7 @@ class EventStreamPermissionsTestCase(unittest.HomeserverTestCase):
 
         hs = self.setup_test_homeserver(config=config)
 
-        hs.get_handlers().federation_handler = Mock()
+        hs.get_federation_handler = Mock()
 
         return hs
 
diff --git a/tests/rest/client/v1/test_rooms.py b/tests/rest/client/v1/test_rooms.py
index 0d809d25d5..9ba5f9d943 100644
--- a/tests/rest/client/v1/test_rooms.py
+++ b/tests/rest/client/v1/test_rooms.py
@@ -32,6 +32,7 @@ from synapse.types import JsonDict, RoomAlias, UserID
 from synapse.util.stringutils import random_string
 
 from tests import unittest
+from tests.test_utils import make_awaitable
 
 PATH_PREFIX = b"/_matrix/client/api/v1"
 
@@ -47,7 +48,10 @@ class RoomBase(unittest.HomeserverTestCase):
             "red", http_client=None, federation_client=Mock(),
         )
 
-        self.hs.get_federation_handler = Mock(return_value=Mock())
+        self.hs.get_federation_handler = Mock()
+        self.hs.get_federation_handler.return_value.maybe_backfill = Mock(
+            return_value=make_awaitable(None)
+        )
 
         async def _insert_client_ip(*args, **kwargs):
             return None
diff --git a/tests/rest/client/v1/test_typing.py b/tests/rest/client/v1/test_typing.py
index 94d2bf2eb1..cd58ee7792 100644
--- a/tests/rest/client/v1/test_typing.py
+++ b/tests/rest/client/v1/test_typing.py
@@ -44,7 +44,7 @@ class RoomTypingTestCase(unittest.HomeserverTestCase):
 
         self.event_source = hs.get_event_sources().sources["typing"]
 
-        hs.get_handlers().federation_handler = Mock()
+        hs.get_federation_handler = Mock()
 
         async def get_user_by_access_token(token=None, allow_guest=False):
             return {
diff --git a/tests/test_federation.py b/tests/test_federation.py
index 27a7fc9ed7..d39e792580 100644
--- a/tests/test_federation.py
+++ b/tests/test_federation.py
@@ -75,7 +75,7 @@ class MessageAcceptTests(unittest.HomeserverTestCase):
             }
         )
 
-        self.handler = self.homeserver.get_handlers().federation_handler
+        self.handler = self.homeserver.get_federation_handler()
         self.handler.do_auth = lambda origin, event, context, auth_events: succeed(
             context
         )