@Override public User create(User user) { return userDao.create(user); }
@Override public void delete(String id) { userDao.delete(id); }
@Override public User get(String userId) { return userDao.get(userId); }
@Override public void update(String userId, User user) { userDao.update(userId, user); }
@Override public Collection<User> list() { return userDao.list(); }