code: async def _get_socket_url(self):
          
          data = await self.api.execute_method(
              self.RTM_START_ENDPOINT,
              simple_latest=True,
              no_unreads=True,
          )
          return data['url']
docs: Get the WebSocket URL for the RTM session.
  
          Warning:
            The URL expires if the session is not joined within 30
            seconds of the API call to the start endpoint.
  
          Returns:
            :py:class:`str`: The socket URL.