hiqdev / yii2-mfa

    public function actionEnable($back = null)

    {

        $user = Yii::$app->user->identity;

        if ($user->totp_secret) {

            Yii::$app->session->setFlash('error', Yii::t('mfa', 'Two-factor authentication is already enabled. Disable first.'));

            return empty($back) ? $this->goHome() : $this->deferredRedirect($back);

        }

        $model = new InputForm();

        $secret = $this->module->getTotp()->getSecret();

                    Yii::$app->session->setFlash('success', Yii::t('mfa', 'Two-factor authentication successfully enabled.'));

                    return empty($back) ? $this->goBack() : $this->deferredRedirect($back);

                } else {

                    Yii::$app->session->setFlash('error', Yii::t('mfa', 'Sorry, we have failed to enable two-factor authentication.'));

                    return empty($back) ? $this->goHome() : $this->deferredRedirect($back);

                }

            } else {

                $model->addError('code', Yii::t('mfa', 'Wrong verification code. Please verify your secret and try again.'));

            }