Ojs\AdminBundle\Events\AdminEvent::getUser PHP Method

    public function getUser()
    {
        return $this->user;
    }

 /**
  * @param AdminEvent $event
  */
 public function onSettingsChange(AdminEvent $event)
 {
     $adminUsers = $this->getAdminUsers();
     /** @var User $user */
     foreach ($adminUsers as $user) {
         $this->sendMail($user, 'Admin Event : Admin System Settings Change -> ' . $event->getEventType(), 'Admin Event : Admin System Settings Change -> ' . $event->getEventType() . ' -> by ' . $event->getUser()->getUsername());
     }
 }