/**
  * Handle an event.
  *
  * @param EventInterface $event
  *
  * @return void
  */
 public function handle(EventInterface $event)
 {
     if (!$event instanceof PlayerCreatedEvent) {
         return;
     }
     $applicationUser = $this->finder->find($event->getExternalReference());
     $applicationUser->linkToPlayer($event->getGameId(), $event->getPlayerId());
     $this->finder->save($applicationUser);
 }