fix: No callback when automatic refresh does not work.

[josefwilhelm]

Description

The automatic refresh of the package works perfectly. But I wanted to test what happens if it fails, and I want to react on a failed refresh in the app.

So, I see the refresh is failing, as I can see the network request with a 400 in the Network Profiler.

But I want to see an error/callback somewhere. But there is no log, or anything. And the onError from the code snippet below does also not trigger.

Steps To Reproduce

    oidcManager.userChanges().listen(
      (event) async {
        print('===== oidc user changes =====');
      },
      onError: (error) {
        print('===== oidc user changes error =====');
      },
      onDone: () {
        print('===== oidc user changes done =====');
      },
    );

Expected Behavior

Callback when a refresh fails.

[ahmednfwela]

This can be added as a subclass to OidcEvent