/// <summary>
        /// Constructeur
        /// </summary>
        public UserManagementViewModel()
        {
            // Set-up commands
            CreateUserCommand = new RelayCommand(param => CreateUser(), param => true);
            AllUserCommand = new RelayCommand(param => AllUser(), param => true);

            // Loading default viewmodel
            CurrentViewModel = new AllUserViewModel();
        }
 /// <summary>
 /// liste utilisateurs
 /// </summary>
 private void AllUser()
 {
     CurrentViewModel = new AllUserViewModel();
 }