Allow modules to set a display name on registration (#12009)

Co-authored-by: Patrick Cloke <clokep@users.noreply.github.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/synapse/rest/client/register.py b/synapse/rest/client/register.py

index c965e2bda2..b8a5135e02 100644
--- a/synapse/rest/client/register.py
+++ b/synapse/rest/client/register.py
@@ -694,11 +694,18 @@ class RegisterRestServlet(RestServlet):
                 session_id
             )
 
+            display_name = await (
+                self.password_auth_provider.get_displayname_for_registration(
+                    auth_result, params
+                )
+            )
+
             registered_user_id = await self.registration_handler.register_user(
                 localpart=desired_username,
                 password_hash=password_hash,
                 guest_access_token=guest_access_token,
                 threepid=threepid,
+                default_display_name=display_name,
                 address=client_addr,
                 user_agent_ips=entries,
             )