code: async def teardown_conn(self, context):
          
  
          client_id = context.user_data
  
          self._logger.info("Tearing down client connection: %s", client_id)
          if client_id not in self.clients:
              self._logger.warning("client_id %s did not exist in teardown_conn", client_id)
          else:
              del self.clients[client_id]
docs: Teardown a connection from a client.