How to return to YII2 address entered before authorization?

Question

Yii

A person follows the link, but he is not authorized, he is redirected to the login form.
After he logs in, he should be redirected to the address he wanted to go to.
How to implement such a thing? I started looking at Url::remember(), but I still don't understand how it works
Url::remember('', 'saveUrl') swears, I don't understand why.

Answer 1

return $this->redirect(Yii::$app->request->referrer);

or
return $this->goBack();

Answer 2

Redirect to `Yii::$app->user->returnUrl`

Answer 3

When redirecting to the login page, specify in GET the page from which you went