public function indexAction()
 {
     if ($this->_request->getParam('id', null) === null) {
         $this->_redirect('/admin/users/');
     }
     $userGateway = new Users_Model_UserGateway();
     $this->view->user = $userGateway->fetchUser($this->_request->id);
     $this->view->userGateway = $userGateway;
 }