public function handleNicknameInUse(ServerEvent $event, Queue $queue)
    {
        // Don't listen if ghost isn't enabled, or this isn't the first nickname-in-use error
        if (!$this->ghostEnabled || $this->ghostNick !== null) {
            return;
        }

        // Save the nick, so that we can send a ghost request once registration is complete
        $params = $event->getParams();
        $this->ghostNick = $params[1];
    }