UserDialog dialog = new UserDialog(service, "Edit Users");
UserDialog dialog = new UserDialog(service, "Edit Users", properties);
	private void newUserAction(ActionEvent ev) {		try {			Collection collection = client.getCollection();			UserManagementService service =				(UserManagementService) collection.getService("UserManagementService", "1.0");			UserDialog dialog = new UserDialog(service, "Edit Users");			dialog.show();		} catch (XMLDBException e) {			showErrorMessage("Failed to retrieve UserManagementService", e);			e.printStackTrace();		}	}