Exercise 8 Creation of Subaccount fails with invalid subdomain

[jung-thomas]

https://github.com/SAP-samples/cloud-btp-cli-api-codejam/blob/main/exercises/08-guids-and-resource-creation/README.md

[jung-thomas]

The issue seems to be related to using the global account display name to generate the subdomain. I'm using our account and there are spaces in the global account display name. Probably not safe to assume all attendees will have safe display names in the global account.