if (!\Yii::$app->user->isGuest) {

        return $this->goHome();
    }

    $model = new LoginForm();
    
    if($model->load(Yii::$app->request->post()) && $model->login()) {
      
        return $this->goBack();
    } else {
        $this->layout = 'login.php';
        return $this->render('login', [
            'model' => $model,
        ]);
    }