Pass user id on registration to token table?

Question

Yii

There are two tables (models) user and token. User data is stored in user, id, email, username, etc., and in token, email confirmation tokens, password changes.
There is a RegistrationForm layer model, with a function for registration:

public function registration()
    {
        if (!$this->validate()) {
            return null;
        }
        $user = new User();
        $user->nickname = $this->nickname;
        $user->email = $this->email;
        $user->setPassword($this->password);
        $user->generateAuthKey();
         /.....
        return $user->save() ? $user : null;
    }

How to write in the table token, token code and id of the current registered user during registration?
Write a function for a token?

public function createEmailConfirmToken()
    {
        $token = new Token();
        $token->code = Yii::$app->security->generateRandomString();
        $token->created_at = time();
        $token->type = Token::CONFIRMATION_EMAIL;

        return $token->save() ? $token : null;
    }

How then to transfer the user ID?
Please describe how to implement it correctly.

Answer 1

You can return user_id from the registration method. The ID of an AR object is called after saving. Those:

if($user->save()){
    return $user->id;
}
return null;