code: def _find_connection(self, topic):
          
  
          parts = topic.split('/')
          if len(parts) < 3:
              return None
  
          slug = parts[-3]
          return slug
docs: Attempt to find a connection id corresponding with a topic
  
          The device is found by assuming the topic ends in <slug>/[control|data]/channel
  
          Args:
              topic (string): The topic we received a message on
  
          Returns:
              int: The internal connect id (device slug) associated with this topic