Yii2 signup without saving session data - authentication

Question

I have registration form in my Yii2 advanced application. In my application only admin can register users. But when I register new user, admin session data are destroyed and new user's session data are set. What I am trying is not to change session data when I register new user. Admin user is still should be set to session data. How to solve this problem. This is my action in controller:
public function actionSignup()
{
$model = new SignupForm();
if(Yii::$app->user->can('admin'))
{
if (($response = self::ajaxValidate($model)) !== false)
return $response;
if (self::postValidate($model))
{
try
{
$trans = Yii::$app->db->beginTransaction();
if ($user = $model->signup()) {
Yii::$app->getUser()->login($user);
}
//tagidan tushgan odamining child_left, child_right tini o'zgartirish
$under = UserModel::findOne($user->id_parent_under);
if ($under->id_child_left == 0)
$under->id_child_left = $user->id;
else
$under->id_child_right = $user->id;
$under->update(false);
ChildrenBinaryModel::insertNewUser($user);
ChildrenClassicModel::insertNewUser($user);
$parents = ChildrenBinaryModel::find()->with('user')->where(["id_child" => $user->id])->orderBy(['depth' => SORT_ASC])->all();
$c_user = $user;
foreach($parents as $p)
{
$p_user = $p->user;
if ($p_user->id_child_left == $c_user->id)
$p_user->ball_left += 100;
else
$p_user->ball_right += 100;
$p_user->update(false);
$c_user = $p_user;
}
$trans->commit();
}
catch(\Exception $e)
{
$trans->rollBack();
return $this->renderContent($e->getMessage());
}
return $this->render('index');
}
return $this->render('signup', [
'model' => $model,
]);
}else{
throw new ForbiddenHttpException;
}
}

Answer 1

Checkout the documentation for \yii\web\User::login(). When this is run in your code by calling Yii::$app->getUser()->login($user), the session data is set to match your $user.
If it's always the admin user that's signing up new users, I'm not sure you even need to run the login method.

Answer 2

I have solved this problem. In order to make answer clearly and simple I will show you default signup action in site controller (Yii2 advanced template):
public function actionSignup()
{
$model = new SignupForm();
if ($model->load(Yii::$app->request->post())) {
if ($user = $model->signup()) {
if (Yii::$app->user->enableSession = false &&
Yii::$app->getUser()->login($user)) {
return $this->goHome();
}
}
}
return $this->render('signup', [
'model' => $model,
]);
}
Only I have done was adding this
Yii::$app->user->enableSession = false
inside the if statement