public function onAuthSuccess(ClientInterface $client)
    {
        return;

        $attributes = $client->getUserAttributes();
        $email = ArrayHelper::getValue($attributes, 'email');
        $id = ArrayHelper::getValue($attributes, 'id');
        #$nickname = ArrayHelper::getValue($attributes, 'login');

        #Y::dump($_REQUEST, false);
        #Y::dump($attributes, true);

        $email = null;

        /* @var Auth $auth */
        $auth = Auth::find()->where([
            'source' => $client->getId(),
            'source_id' => $id,
        ])->one();

        if (Yii::$app->user->isGuest) {
            if ($auth) { // login
                /* @var User $user */
                $user = $auth->user;
                #$this->updateUserInfo($user);
                Yii::$app->user->login($user, Yii::$app->params['user.rememberMeDuration']);
            } else { // signup

                if ($email === null) {
                    Y::app()->getSession()->set('emptyEmail', ArrayHelper::getValue($attributes, 'User'));
                    Yii::$app->getSession()->setFlash('error', 'User with the same email already exists but isn\'t linked to it. Login using email first to link it.');
                } elseif ($user = User::findOne(['email' => $email])) {
                    $transaction = User::getDb()->beginTransaction();

                    $auth = new Auth([
                        'user_id' => $user->id,
                        'source' => $client->getId(),
                        'source_id' => (string)$id,
                    ]);
                    if ($auth->save()) {
                        $transaction->commit();
                        Yii::$app->user->login($user, Yii::$app->params['user.rememberMeDuration']);
                    } else {
                        Yii::$app->getSession()->setFlash('error', 'Unable to save, errors: ' . json_encode($auth->getErrors()));
                    }
                } else {
                    #Y::dump(Yii::$app->params, true);
                    $password = Yii::$app->security->generateRandomString(6);
                    $user = new User([
                        #'username' => $nickname,
                        #'github' => $nickname,
                        'email' => $email,
                        'password' => $password,
                    ]);
                    $user->generateAuthKey();
                    $user->generatePasswordResetToken();

                    $transaction = User::getDb()->beginTransaction();

                    if ($user->save()) {
                        $auth = new Auth([
                            'user_id' => $user->id,
                            'source' => $client->getId(),
                            'source_id' => (string)$id,
                        ]);
                        if ($auth->save()) {
                            $transaction->commit();
                            Yii::$app->user->login($user, Yii::$app->params['user.rememberMeDuration']);
                        } else {
                            Yii::$app->getSession()->setFlash('error', [
                                Yii::t('app', 'Unable to save {client} account: {errors}', [
                                    'client' => $client->getTitle(),
                                    'errors' => json_encode($auth->getErrors()),
                                ]),
                            ]);
                        }
                    } else {
                        Yii::$app->getSession()->setFlash('error', [
                            Yii::t('app', 'Unable to save user: {errors}', [
                                'client' => $client->getTitle(),
                                'errors' => json_encode($user->getErrors()),
                            ]),
                        ]);
                    }
                }
            }
        } else { // user already logged in
            if (!$auth) { // add auth provider
                Y::dump($attributes, true);
                $auth = new Auth([
                    'user_id' => Yii::$app->user->id,
                    'source' => $client->getId(),
                    'source_id' => (string)$attributes['id'],
                ]);
                if ($auth->save()) {
                    /** @var User $user */
                    $user = $auth->user;
                    #$this->updateUserInfo($user);
                    Yii::$app->getSession()->setFlash('success', [
                        Yii::t('app', 'Linked {client} account.', [
                            'client' => $client->getTitle()
                        ]),
                    ]);
                } else {
                    Yii::$app->getSession()->setFlash('error', [
                        Yii::t('app', 'Unable to link {client} account: {errors}', [
                            'client' => $client->getTitle(),
                            'errors' => json_encode($auth->getErrors()),
                        ]),
                    ]);
                }
            } else { // there's existing auth
                Yii::$app->getSession()->setFlash('error', [
                    Yii::t('app',
                        'Unable to link {client} account. There is another user using it.',
                        ['client' => $client->getTitle()]),
                ]);
            }
        }
    }