public function viewListeUsers()
 {
     $users = FoxFWUsers::ListeUsers();
     $tab_grade = $GLOBALS['Config']['Roles'];
     foreach ($users as $key) {
         $grade = explode('|', $key['roles']);
         //suppresion des 2 premier grade commun a tout le monde
         array_shift($grade);
         array_shift($grade);
         $key['roles'] = $grade;
     }
     return $GLOBALS['Twig']->render(FoxFWKernel::getView('users_listeUsers'), array('users' => $users, 'roles' => $tab_grade));
 }