用户扩展FOSUserBundle时，isGranted返回FALSE

if ($this->securityContext->isGranted('ROLE_USER')) {
    // 用户已登录并具有ROLE_USER权限
}

$user = $this->userManager->findUserBy(['username' => 'example']);
$user->addRole('ROLE_USER');
$this->userManager->updateUser($user);

security:
    access_control:
        - { path: ^/admin, roles: ROLE_ADMIN }

$aclProvider = $this->container->get('acl.provider');
$acl = $aclProvider->createAcl($objectIdentity);
$acl->addPermission(new Permission('VIEW'), $acl->getDefaultAceOrder());
$aclProvider->updateAcl($acl);

php bin/console cache:clear --env=prod

use Symfony\Component\Security\Core\Exception\AccessDeniedException;
use Symfony\Component\Security\Core\Security;

class AdminController extends AbstractController
{
    public function index()
    {
        if (false === $this->securityContext->isGranted('ROLE_ADMIN')) {
            throw new AccessDeniedException();
        }

        return $this->render('admin/index.html.twig');
    }
}