List<RiakDatatype> numLoginsElement = usernameMap.get(BinaryValue.create(numLogins));
assertNotNull(numLoginsElement);
assertEquals(1, numLoginsElement.size());
assertTrue(numLoginsElement.get(0).isCounter());
RiakCounter numLoginsCounter = numLoginsElement.get(0).getAsCounter();
assertEquals((Long) 1L, numLoginsCounter.view());
// last-login - register
List<RiakDatatype> lastLoginTimeElement = usernameMap.get(BinaryValue.create(lastLoginTime));
assertNotNull(lastLoginTimeElement);
assertEquals(1, lastLoginTimeElement.size());