public User userFromId(Long id) {
        if (id == null) {
            return null;
        }
        User user = new User();
        user.setId(id);
        return user;
    }
@Test
    void testUserFromId() {
        assertThat(userMapper.userFromId(DEFAULT_ID).getId()).isEqualTo(DEFAULT_ID);
        assertThat(userMapper.userFromId(null)).isNull();
    }