How to debug user Permissions

I am getting the following error:
Nette\Application\ForbiddenRequestException #403

OK, so the user (admin) does not have permission to access the resource, but I am unsure why.
How can I see all the permissions for a user? (in this case admin)?

The error says:

22: $user = $this->getUser();
23: $content = ‘this is the default content’;
24: $this->template->content = $content;
25: }
26:
27: protected function startup(): void
28: {
29: parent::startup();
30:
31: if (!$this->getUser()->isAllowed(‘backend’)) {
32: throw new Nette\Application\ForbiddenRequestException;
33: }
34: }
35:
36: }

<?php

declare(strict_types=1);

namespace App\AdminModule\Presenters;

use Nette;
use App\Model;
use Nette\Application\Helpers;

final class DefaultPresenter extends Nette\Application\UI\Presenter
{
        ### public function __construct(Nette\Database\Context $database)
        public function __construct()
        {
                ### $this->database = $database;
                $path = __DIR__.'/../../layouts/@default.latte';
                parent::setLayout( $path );
        }

        public function renderDefault() {
                $user = $this->getUser();
                $content = 'this is the default content';
                $this->template->content = $content;
        }

        protected function startup(): void
        {
                parent::startup();

                if (!$this->getUser()->isAllowed('backend')) {
                        throw new Nette\Application\ForbiddenRequestException;
                }
        }

}
?>