//say hi to some more users to fill up the map a bit
user = new UserImpl("Galaxy");
System.out.println(hw.sayHiToUser(user));
user = new UserImpl("Universe");
System.out.println(hw.sayHiToUser(user));
System.out.println();
System.out.println("Users: ");
Map<Integer, User> users = hw.getUsers();
for (Map.Entry<Integer, User> e : users.entrySet()) {