public void AddLogin(LoginModel loginModel)
        {
            _folderModel.Logins.Add(loginModel);
            LoginTreeViewModel newLoginViewModel = new LoginTreeViewModel(loginModel, this);

            FolderViewModelsCollection.Add(newLoginViewModel);
        }
 public void DeleteLogin(LoginModel loginModel, LoginTreeViewModel loginTreeViewModel)
 {
     _folderModel.Logins.Remove(loginModel);
     _folderViewModelsCollection.Remove(loginTreeViewModel);
 }