private void printAddUser() throws IOException {
		String s, username = null, password = null;
		printMenu(PrintMenuName.ADD_USER);
		while (true) {
			s = br.readLine();
			System.out.println(s);
			if (s.equals("b")) break;
			else if (s != null) {
				if (username == null) username = s;
				else {
					password = s;
					try {
						userService.createNewUser(username, password);
						System.out.println("New user is added");
					} catch (MyEmptyUserNameException e) {
						System.out.println(e.getMessage());
					} catch (MyEmptyPasswordException e) {
						System.out.println(e.getMessage());
					} catch (MyUserAlreadyExistException e) {
						System.out.println(e.getMessage());
					} finally {
						username = null;
						printMenu(PrintMenuName.ADD_USER);
					}
				}
			}
		}
		printMenu(PrintMenuName.MAIN_MENU);
	}