Log user that is making /publicRooms calls

synapse/rest/client/v1/room.py

@@ -279,6 +279,13 @@ class PublicRoomListRestServlet(ClientV1RestServlet):
 
     @defer.inlineCallbacks
     def on_GET(self, request):
+        try:
+            yield self.auth.get_user_by_req(request)
+        except AuthError:
+            # This endpoint isn't authed, but its useful to know who's hitting
+            # it if they *do* supply an access token
+            pass
+
         handler = self.hs.get_room_list_handler()
         data = yield handler.get_aggregated_public_room_list()