what's the method to catch registration errors using the client SDK? For example if I type my password wrong under call service in the SDK sample application, all I get is the "logging in" screen. Of course in the debug logs and traceSM, I can see the problem, but what is the method to catch these errors. or when I connect to a service such as AADS and i type in the wrong URL, I don't get the events triggered. The events are triggered sometimes due to other issues. I have been looking at the events (for example the below one), but none of these are triggered for bad password, or bad AADS URL...

user.RegistrationInProgress += RegistrationInProgress;
user.RegistrationSuccessful += RegistrationSuccessful;
user.AllRegistrationsSuccessful += AllRegistrationsSuccessful;
user.RegistrationFailed += RegistrationFailed;
user.UnregistrationSuccessful += UnregistrationSuccessful;
user.UnregistrationFailed += UnregistrationFailed;
user.AllRegistrationsFailed += AllRegistrationsFailed;

so what's the way to catch such errors?