protected function getUser()
 {
     if ($this->_user === null) {
         $this->_user = AdminUser::findByEmail($this->email);
         $this->_user = $this->_user ? $this->_user : false;
     }
     return $this->_user;
 }
 public function down()
 {
     if ($user = AdminUser::findOne(['email' => self::INIT_ADMIN_EMAIL])) {
         $user->delete();
     }
 }