protected function getAllowedRoles()
    {
        if ($this->request->user('administrator')->isRole('super-administrator')) {
            $roles = $this->role->newQuery()->get();
        } else {
            $roles = $this->role->newQuery()->where('slug', '!=', 'super-administrator')->get();
        }

        return $roles->pluck('name', 'id');
    }