code: def join(self, new_channel, nick, pwd=None):
          
          self._send_packet({"cmd": "join", "channel": new_channel,
                             "nick": self._format_nick(nick, pwd)})
docs: Joins a new channel.
  
          Keyword arguments:
          new_channel: <str>; the channel to connect to
          nick: <str>; the nickname to use
          pwd: <str>; the (optional) password to use