SonataUserBundle/Admin/Entity/UserAdmin.php

<?php

/*
 * This file is part of the Sonata package.
 *
 * (c) Thomas Rabaix <thomas.rabaix@sonata-project.org>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Sonata\UserBundle\Admin\Entity;

use Sonata\UserBundle\Admin\Model\UserAdmin as BaseUserAdmin;
use Sonata\AdminBundle\Form\FormMapper;

class UserAdmin extends BaseUserAdmin
{
    /**
     * {@inheritdoc}
     */
    protected function configureFormFields(FormMapper $formMapper)
    {
        parent::configureFormFields($formMapper);

        $formMapper
            ->with('Management')
                ->add('credentialsExpired', null, array('required' => false))
            ->end()
        ;
    }
}