protected static void printUserList(Collection<UserID> users) {

    Iterator<UserID> it = users.iterator();

    while (it.hasNext()) {
      UserID user = it.next();
      System.out.println(
          "Username: "******"Name: " + user.getName() + " " + user.getAttributes());
    }

    if (users.isEmpty()) System.out.println("No results");
  }