private async void EditUser_Click(object sender, RoutedEventArgs e)
        {
            UserDialog dialog = new UserDialog();

            dialog.ViewModel.CurrentUser = new Models.User(0);
            dialog.ViewModel.CurrentUser.Update(ViewModel.CurrentUser);
            if (await dialog.ShowAsync() == ContentDialogResult.Primary)
            {
                ViewModel.CurrentUser.Update(dialog.ViewModel.CurrentUser, false);
                await ViewModel.SaveSettings();

                await ViewModel.SendUpdateUser(ViewModel.CurrentUser);
            }
        }
        private async void AddUser_Click(object sender, RoutedEventArgs e)
        {
            UserDialog dialog = new UserDialog();

            dialog.ViewModel.CurrentUser = new Models.User(ViewModel.Settings.NextUserId);
            if (await dialog.ShowAsync() == ContentDialogResult.Primary)
            {
                if (await ViewModel.SendNewUser(dialog.ViewModel.CurrentUser))
                {
                    ViewModel.Settings.Users.Add(dialog.ViewModel.CurrentUser);
                    ViewModel.Settings.NextUserId++;
                    await ViewModel.SaveSettings();
                }
            }
        }