Didn't provision properly. In a provisioning state of failed. I get the followoing when trying to delete from portal/Azure CLI:

Failed to delete container service 'GTK8s'. Error: 'autorest/azure: Service returned an error. Status=401 Code="InvalidAuthenticationToken" Message="The received access token is not valid: at least one of the claims 'puid' or 'altsecid' or 'oid' should be present. If you are accessing as application please make sure service principal is properly created in the tenant."'

I can't see a service principal relating to this application in Azure AD.