docs: def on_get(self, request, response, room_alias=None):
          """Called when a GET request is sent to /rooms/{room_alias}"""
          response.body = "{}"
          if self.handler(room_alias):
              response.status = falcon.HTTP_200
              self.api.create_room(alias=room_alias)
          else:
              response.status = falcon.HTTP_404