PAYG Checks

If the script fails to collect the credentials, it should provide a proper error message in the logs and in the Web UI.

If the credentials are not working, reposync should show the proper error.

Refreshing or changing the registercloudguest connection to the public cloud update infrastructure should not interfere with the credentials usage.

Running `registercloudguest --clean will cause problems if no new cloud connection is registered with the cloud guest command.