@Ignore
@Test
public void ldapAuthenticatorRejectsInvalidUsername() throws Exception {

  String crazyUsername = "sysadmin)`~!@#$%^&*()+=[]{}\\|;:'\",<>?/\r\n\t";
  Optional<User> missingUser =
      ldapAuthenticator.authenticate(new BasicCredentials(crazyUsername, "badpass"));
  assertThat(missingUser).isEmpty();
}