Merge commit '31acc5c30' into anoa/dinsic_release_1_21_x

* commit '31acc5c30':
  Escape the error description on the sso_error template. (#8405)
  Fix occasional "Re-starting finished log context" from keyring (#8398)
  Allow existing users to login via OpenID Connect. (#8345)
  Fix schema delta for servers that have not backfilled (#8396)
  Fix MultiWriteIdGenerator's handling of restarts. (#8374)
  s/URLs/variables in changelog
  s/accidentally/incorrectly in changelog
  Update changelog wording
  Add type annotations to SimpleHttpClient (#8372)
  Add new sequences to port DB script (#8387)
  Add EventStreamPosition type (#8388)
  Mark the shadow_banned column as boolean in synapse_port_db. (#8386)

1 files changed, 2 insertions, 2 deletions

diff --git a/synapse/storage/databases/main/registration.py b/synapse/storage/databases/main/registration.py

index a06451b7f0..2ed696cc14 100644
--- a/synapse/storage/databases/main/registration.py
+++ b/synapse/storage/databases/main/registration.py
@@ -472,7 +472,7 @@ class RegistrationWorkerStore(SQLBaseStore):
 
     async def get_user_by_external_id(
         self, auth_provider: str, external_id: str
-    ) -> str:
+    ) -> Optional[str]:
         """Look up a user by their external auth id
 
         Args:
@@ -480,7 +480,7 @@ class RegistrationWorkerStore(SQLBaseStore):
             external_id: id on that system
 
         Returns:
-            str|None: the mxid of the user, or None if they are not known
+            the mxid of the user, or None if they are not known
         """
         return await self.db_pool.simple_select_one_onecol(
             table="user_external_ids",