use GonterAcl\Annotation\Role;

class IndexController extends AbstractActionController
{

  /**
   * here u can pass roles in annotations wich users can use this action.
   * @Role(roles={"guest","user","admin"})
   */
  public function indexAction()
  {
    return;
  }
}

return array(
  'modules' => array(
      // other modules
      'GonteroAcl'
  ),
  // other content
);

return array(
    'gontero-acl' => array(
        // if you use Auth adapter inside this module u can use bCrypt cost
        'bCryptCost' => 4,
        // if you use Doctrine its name of user entity
        'userEntity' => '',
    )
);