Add user_directory_search_enabled check

synapse/rest/client/shared_rooms.py

@@ -43,11 +43,19 @@ def __init__(self, hs: "HomeServer"):
         self.auth = hs.get_auth()
         self.store = hs.get_datastore()
         self.user_directory_active = hs.config.server.update_user_directory
+        self.hs = hs
 
     async def on_GET(
         self, request: SynapseRequest, user_id: str
     ) -> Tuple[int, JsonDict]:
 
+        if not self.hs.config.userdirectory.user_directory_search_enabled:
+            raise SynapseError(
+                code=400,
+                msg="User directory searching is disabled",
+                errcode=Codes.UNKNOWN,
+            )
+
         UserID.from_string(user_id)
 
         requester = await self.auth.get_user_by_req(request)