Unable to run SDK as per example

[gente21]

I keep getting a “Please check your login credentials and try again” error, I’m creating a client object and setting up username, password and programToken:

Hyperwallet client = new Hyperwallet( username, password, programToken );

I'm using the exact same credentials provided in the API Credentials page, I've reset the password a few times just to make sure that that's not the issue.

HyperwalletList<HyperwalletUser> allUsers = client.listUsers();

Fails every single time. I'm using the JAVA SDK 0.5.0.

Any help is greatly appreciated.