Initial-Setup Addon failure feedback for user

Hi Red Hat Installer Engineering Team,

I have a few anaconda/initial-setup add-ons and require that a user may not continue through initial-setup to the desktop if an add-on fails to perform a given action.
Being able to provide feedback to the user, a simple "Please reinstall the system." and a reboot button is all I am looking to accomplish. It appears the execute method currently ignores failures.

Is there is an easy way to prevent the user from continuing if an add-on fails in initial-setup? Aside from issuing a reboot cmd, which keeps the user in initial-setup since /.unconfigured is not cleaned up.

Best Regards,
Martin Kuna

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