Symfony Controller return response not working

Question

Here is my code,

class LoginController
{
    public function authUser()
    {
        return "OK";
        exit();
    }
}

Its redirect to 404. But if I use below code its working, what's wrong in first code.

class LoginController
{
    public function authUser()
    {
        return $this->render('test.html.php', array());
    }
} 

Answer 1

You need to return an Response object like this :

class LoginController
{
    public function authUser()
    {
        return new Response("OK");
    }
}

https://api.symfony.com/3.4/Symfony/Component/HttpFoundation/Response.html