Create a symfony2 remember me cookie manually (FOSUserBundle)

Question

Could somebody explain how you can manually create a remember me cookie in a controller?

I want the users to stay logged in after they pressed the "register" button, without having to login with their credentials afterwards.

I've tried to create a cookie manually but i'm guessing the cookie value is incorrect, and therefor the "remember me" functionality doesn't work. A cookie with the correct name gets set. I've checked that.

The remember me functionality works as expected when using the normal login procedure with the user's credentials.

security.yml security.yml remember me

security:
   firewalls:
       main:
           remember_me:
               lifetime: 86400
               domain:   ~
               path:     /
               key:      myKey

This is what I have now, even though the cookie is set, it doesn't work.

$um = $this->get('fos_user.user_manager');
$member = $um->createUser();

… Form stuff with bindRequest etc.

$um->updatePassword($member);
$um->updateUser($member);

$providerKey = $this->container->getParameter('fos_user.firewall_name');
$securityKey = 'myKey';

$token = new RememberMeToken($member, $providerKey, $securityKey,
$member->getRoles());
$this->container->get('security.context')->setToken($token);

$redirectResponse = new RedirectResponse($url);
$redirectResponse->headers->setCookie(
   new \Symfony\Component\HttpFoundation\Cookie(
       'REMEMBERME',
       base64_encode(implode(':', array($member->getUsername(),
$member->getPassword()))),
       time() + 60*60*24
   )
);
return $redirectResponse;

Update:

I've also tried working with the PersistentTokenBasedRememberMeServices class with reflection but it does not work. a cookie gets set but it's not working

$token = $this->container->get('security.context')->getToken();

$providerKey = $this->container->getParameter('fos_user.firewall_name');
$securityKey = 'myKey';

$persistenService = new
PersistentTokenBasedRememberMeServices(array($um), $providerKey,
$securityKey, array('path' => '/', 'name' => 'REMEMBERME', 'domain' =>
null, 'secure' => false, 'httponly' => true,
'lifetime' => 86400));
$persistenService->setTokenProvider(new InMemoryTokenProvider());

$method = new \ReflectionMethod('Symfony\Component\Security\Http\RememberMe\PersistentTokenBasedRememberMeServices',
'onLoginSuccess');
 $method->setAccessible(true);
$method->invoke($persistenService, $request, $redirectResponse, $token);

I'm using Symfony v2.0.5 and FOSUserBundle 1.0

UPDATE 2:

I've tried a 3rd way. The same as above but without reflection:

$token = $this->container->get('security.context')->getToken();

$providerKey = $this->container->getParameter('fos_user.firewall_name');
$securityKey = 'myKey';

$persistenService = new PersistentTokenBasedRememberMeServices(array($um), $providerKey, $securityKey, array('path' => '/', 'name' => 'REMEMBERME', 'domain' => null, 'secure' => false, 'httponly' => true, 'lifetime' => 31536000, 'always_remember_me' => true, 'remember_me_parameter' => '_remember_me'));
$persistenService->setTokenProvider(new InMemoryTokenProvider());

$persistenService->loginSuccess($request, $redirectResponse, $token);