public AddUserViewModel()
        {
            AddUser = new RelayCommand(() =>
            {
                DialogService dialogService = new DialogService();

                if (string.IsNullOrEmpty(Login) || string.IsNullOrEmpty(Password) || SelectedBde == null)
                {
                    dialogService.ShowInformationModern("Vérifier qu'aucun champ n'est vide !", "Formulaire invalide !");
                    return;
                }

                UserService.AddUser(Login, LoginService.CalculateMd5Hash(Password), SelectedBde, IsActive, IsAdmin);
                Close();
            }, o => true);
            CloseWindow = new RelayCommand(() => Close(), o => true);
        }