private async void addSavings_Click(object sender, RoutedEventArgs e)
 {
     MessageDialog SavingsAccCreation = new MessageDialog($"Account ID: {AccountLogic.AddSavingsAccount(customer)}", "Savings Account Created!");
     await SavingsAccCreation.ShowAsync();
 }
 private void addSavings_Click(object sender, RoutedEventArgs e)
 {
     AccountLogic.AddSavingsAccount(customer);
 }