Yii2. How to authenticate a user by given parameters?

Question

Yii

Hello.
There is a site on Yii2 in the internal network, user authentication occurs through an external resource.
The user data is returned from the external resource.
It is necessary to authenticate the user according to the received parameters without transferring him to the authorization form.
This code in the authorization form works correctly:

$identity = User::findOne(['username' => $username]);
Yii::$app->user->login($identity);

Can you please tell me where is the right place to start the authentication process?
Thanks in advance

Answer 1

The user data is returned from the external resource.

That's where you launch it. There are other options?