Pagekit\Auth\Event\AuthenticateEvent::getCredentials PHP Method

    public function getCredentials()
    {
        return $this->credentials;
    }

 public function onAuthSuccess(AuthenticateEvent $event)
 {
     if (!($credentials = $event->getCredentials()) or !isset($credentials['username'])) {
         return;
     }
     App::cache()->delete($this->getCacheKey($credentials['username']));
 }