amnah\yii2\user\controllers\AuthController::registerAndLoginUser PHP Method

    protected function registerAndLoginUser($client, $userAuth)
    {
        /** @var \amnah\yii2\user\models\User $user */
        /** @var \amnah\yii2\user\models\Profile $profile */
        /** @var \amnah\yii2\user\models\Role $role */
        $role = $this->module->model("Role");
        // set user and profile info
        $attributes = $client->getUserAttributes();
        $function = "setInfo" . ucfirst($client->name);
        // "setInfoFacebook()"
        list($user, $profile) = $this->{$function}($attributes);
        // calculate and double check username (in case it is already taken)
        $fallbackUsername = "{$client->name}_{$userAuth->provider_id}";
        $user = $this->doubleCheckUsername($user, $fallbackUsername);
        // save new models
        $user->setScenario("social");
        $user->setRegisterAttributes($role::ROLE_USER, $user::STATUS_ACTIVE)->save();
        $profile->setUser($user->id)->save();
        $userAuth->setUser($user->id)->save();
        // log user in
        Yii::$app->user->login($user, $this->module->loginDuration);
    }