RegisterForm() Error

Hi

Please help I am getting error below trying to display RegisterForm()

! ) Warning: Declaration of atk4\login\RegisterForm::setModel(atk4\data\Model $user) should be compatible with atk4\ui\Form::setModel(atk4\data\Model $model, $fields = NULL) in C:\Development\wamp64\www\myAPP\vendor\atk4\login\src\RegisterForm.php on line 4

my code is:

<?php

include 'vendor/autoload.php';

$dsn = 'mysql://root:root@localhost/test';

$app = new \atk4\ui\App();
$app->initLayout('Admin');
$app->dbConnect($dsn);


$app->add(new \atk4\login\RegisterForm())
    ->setModel(new \atk4\login\Model\User($app->db));