public function init() {
        parent::init();
        $this->authManager = Yii::$app->getAuthManager();
        if (!$this->authManager instanceof DbManager) {
            throw new InvalidConfigException('You should configure "authManager" component to use database before executing this migration.');
        }
    }
public function init() {
        parent::init();
        $this->authManager = Yii::$app->getAuthManager();
        if (!$this->authManager instanceof DbManager) {
            throw new InvalidConfigException('You should configure "authManager" component to use database before executing this migration.');
        }
    }
public function init ( ) { parent :: init ( ) ; $ this -> authManager = Yii :: $ app -> getAuthManager ( ) ; if ( ! $ this -> authManager instanceof DbManager ) { throw new InvalidConfigException ( 'You should configure "authManager" component to use database before executing this migration.' ) ; } }
Initialize migrations.
Calls parent init method, then loads current authManager instance.

@return DbManager
@throws yii\base\InvalidConfigException
Initialize migrations . Calls parent init method then loads current authManager instance .