// last-login - register
List<RiakDatatype> lastLoginTimeElement = usernameMap.get(BinaryValue.create(lastLoginTime));
assertNotNull(lastLoginTimeElement);
assertEquals(1, lastLoginTimeElement.size());
assertTrue(lastLoginTimeElement.get(0).isRegister());
RiakRegister lastLoginTimeRegister = lastLoginTimeElement.get(0).getAsRegister();
assertTrue(Arrays.equals(now, lastLoginTimeRegister.getValue().getValue()));
// logged-in - flag
List<RiakDatatype> loggedInElement = usernameMap.get(BinaryValue.create(loggedIn));
assertNotNull(loggedInElement);
assertEquals(1, loggedInElement.size());