kick the user_directory index when new users register

synapse/handlers/register.py

@@ -38,6 +38,7 @@ class RegistrationHandler(BaseHandler):
         self.auth = hs.get_auth()
         self._auth_handler = hs.get_auth_handler()
         self.profile_handler = hs.get_profile_handler()
+        self.user_directory_handler = hs.get_user_directory_handler()
         self.captcha_client = CaptchaServerHttpClient(hs)
 
         self._next_generated_user_id = None
@@ -165,6 +166,13 @@ class RegistrationHandler(BaseHandler):
                 ),
                 admin=admin,
             )
+
+            if self.hs.config.user_directory_include_pattern:
+                profile = yield self.store.get_profileinfo(localpart)
+                yield self.user_directory_handler.handle_local_profile_change(
+                    user_id, profile
+                )
+
         else:
             # autogen a sequential user ID
             attempts = 0