vk13s

public function actionSignup()
    {
        $model = new SignupForm();
        if ($model->load(Yii::$app->request->post())) {
            if ($user = $model->signup()) {
                if (Yii::$app->user->login($user)) {
                    return $this->redirect(['index']);
                }
            }
        }
        return $this->render('signup', compact('model'));
    }