code: async def unsubscribe(self, topic: str):
          
  
          req_msg = {
              'type': 'unsubscribe',
              'topic': topic,
              'response': True
          }
  
          await self._conn.send_message(req_msg)
docs: Unsubscribe from a topic
  
          :param topic: required
  
          :returns: None
  
          Sample ws response
  
          .. code-block:: python
  
              {
                  "id": "1545910840805",
                  "type": "ack"
              }