SecurityCredentials *credentials = new SecurityCredentials(service_url, some_secret_key);
credentials->IsValid();
credentials->ChangeKey(new_secret_key); // Does occur during a normal program as these change frequently.

AlarmZone zone(credentials, 0);
zone->IsArmed();
zone->SetArmed(true);

AlarmZone another_zone(credentials, 1);
another_zone->IsArmed();
another_zone->SetArmed(true);