/**
  * @param \Cake\Event\Event $event Event object
  * @param \OAuthServer\Model\Entity\Client $client Client entity
  * @return void
  */
 public function beforeSave(Event $event, Client $client)
 {
     if ($client->isNew()) {
         $client->id = base64_encode(uniqid() . substr(uniqid(), 11, 2));
         // e.g. NGYcZDRjODcxYzFkY2Rk (seems popular format)
         $client->generateSecret();
     }
 }