// save the login token into the session and put it in a cookie
$container->get('session')->set('_security_'.$firewallName, serialize($container->get('security.token_storage')->getToken()));
// save the login token into the session and put it in a cookie
$container->get('session')->set('_security_'.$firewallName, serialize($container->get('security.token_storage')->getToken()));