code: def conn_handler(self, session: ClientSession, proxy: str = None) -> ConnectionHandler:
          
          if self.server:
              return ConnectionHandler("https", "wss", self.server, self.port, self.path, session, proxy)
          elif self.ipv6:
              return ConnectionHandler("https", "wss", "[{0}]".format(self.ipv6), self.port, self.path, session, proxy)
  
          return ConnectionHandler("https", "wss", self.ipv4, self.port, self.path, session, proxy)
docs: Return connection handler instance for the endpoint
  
          :param session: AIOHTTP client session instance
          :param proxy: Proxy url
          :return: