@Test
 public void test_03_Save() {
   User user = new User("test01", "test01", "Test01", "*****@*****.**", "");
   users.save(user);
   User userLoad = users.findByUsername("test01");
   assertEquals("User was not saved", "test01", userLoad.getUsername());
 }
 @Test
 public void test_02_FindByUsername() {
   User user = users.findByUsername("tes01");
   assertEquals("Unable to find the user 'test01'", "test01", user.getUsername());
 }