private void OnUserInviteButtonClicked(object sender, System.Windows.RoutedEventArgs e)
{
var username = UserTextBox.Text;
string factoryString = (string)FactoryDropdown.SelectedItem;
int factoryID = HelperFunctions.GetIdFromFactoryString(factoryString);
String message = "User " + username + " konnte nicht hinzugefügt werden.";
Boolean success = csu.AddMemberToMemberAccess(factoryID, username);
if (success)
{
message = "User " + username + " wurde erfolgreich zu " + factoryString + " hinzugefügt";
}
ShowPopUp(message);
UserTextBox.Clear();
}