public UserService(){
		UserXMLHandler usXMLHandler= new UserXMLHandler();
		try {
			userList=(UserListRoot) usXMLHandler.readFromFile();
		} catch (JAXBException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (SAXException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}