/**
  * @admin
  */
 public function users($id = null)
 {
     if ($id != null) {
         View::$viewBag['editing'] = $id;
     }
     if (isset($_POST['editUserButton'])) {
         $username = $_POST['username'];
         $email = $_POST['email'];
         $role = $_POST['role'];
         $cash = $_POST['cash'];
         $userId = $_POST['userId'];
         $userModels = new UsersModels();
         $userModels->editUser($username, $email, $role, $cash, $userId);
     }
     $userModel = new UsersModels();
     $users = $userModel->getAllUsers();
     $model["users"] = $users;
     $categoriesModel = new CategoriesModel();
     $categories = $categoriesModel->getAllCategories();
     $model["categories"] = $categories;
     return new View($model);
 }