Anon. in Custom User Provider - php

Question

I want to manage my users without Database, and check their JWT
I use Guard and a Custom Service to Validate my JWT.
I Want to use even a custom user provider, And If user doesn't have JWT I want to redirect to a new page or call an exception
this is my code
class WebserviceUserProvider implements UserProviderInterface {
/**
* #var \Symfony\Component\Routing\RouterInterface
*/
private $router;
private $requestStack;
/**
* WebserviceUserProvider constructor.
* #param RequestStack $router
*/
public function __construct($router,RequestStack $requestStack) {
$this->router = $router;
$this->requestStack = $requestStack;
}
public function refreshUser(UserInterface $user) {
if (!$user instanceof User) {
throw new UnsupportedUserException(
sprintf('Instances of "%s" are not supported.', get_class($user))
);
}
return $this->loadUserByUsername($user->getUsername());
}
public function loadUserByUsername($username) {
if (!$token = $this->requestStack->getCurrentRequest()->headers->get('Authorization') ?: $this->requestStack->getCurrentRequest()->query->get('token')) {
throw new UsernameNotFoundException('Could not find user. Sorry!');
}
$user = new \AppBundle\Entity\User('MyUsername');
$user->setJwtToken($token);
return $user;
}
public function supportsClass($class) {
return $class === 'AppBundle\Security\User\WebserviceUser';
}
}
And this is my service.yml
app.webservice_user_provider:
class: AppBundle\Security\WebserviceUserProvider
arguments: ['#router','#request_stack']
And My security.yml
user-providers
providers:
webservice:
id: app.webservice_user_provider
When I visit a url with token in queryString
http://127.0.0.1:8000/app_dev.php/?token=my.token.jwt
My User is logged.
When visit
http://127.0.0.1:8000/app_dev.php/
I have an user anon. ( My token is set to Anon. ) and I don't have an exception
If I change loadUserByUsername with
public function loadUserByUsername($username) {
if (!$token = $this->requestStack->getCurrentRequest()->headers->get('Authorization') ?: $this->requestStack->getCurrentRequest()->query->get('token')) {
$url = $this->router->generate('errorPage');
return new RedirectResponse($url);
}
$user = new \AppBundle\Entity\User('MyUsername');
$user->setJwtToken($token);
return $user;
}
I have this error
Attempted to call an undefined method named "getUsername" of class
"Symfony\Component\HttpFoundation\RedirectResponse". 500 Internal
Server Error - UndefinedMethodException
How can I redirect to a page if I dont'have a JWT ( or is not valid ), or have an exception ?