I promiss it.
I have added all the users when MinaTaskServer class started.
TaskService taskService = new TaskService(emfTask, SystemEventListenerFactory.getSystemEventListener());
/*
* Add the required users
*/
TaskServiceSession taskSession = taskService.createSession();
taskSession.addUser(new User("Administrator"));
taskSession.addGroup(new Group("Stuff"));
taskSession.addUser(new User("kvsi"));
taskSession.addGroup(new Group("Manager"));
taskSession.addUser(new User("john"));
taskSession.addUser(new User("krisv"));
/* Start Mina server for HT */
MinaTaskServer server = new MinaTaskServer(taskService);
Thread thread = new Thread(server);
thread.start();