You need to remove “/auth” from path, that was deprecated since Quarkus distribution. If you want to continue to use it, you need to proceed with that environment variable:
That’s only half the rent.
You most probably don’t want to authenticate your users agains the master realm and a client Test-App-realm. Most likely, you want your users to authenticate in realm Test-App-realm with a client which is configured in this realm and also the user is configured in this realm.
The master realm is a management/admin realm only!