/**
  * @param UserRegistered $userRegistered
  */
 public function applyUserRegistered(UserRegistered $userRegistered)
 {
     $this->setIdentifier($userRegistered->userIdentifier());
     $this->hashedPassword = $userRegistered->hashedPassword();
     $this->username = $userRegistered->username();
 }
 /**
  * @param UserRegistered $event
  */
 public function handleUserRegistration(UserRegistered $event)
 {
     $this->insertUsername($event->userIdentifier(), $event->username());
 }