Guest creation via the Guest Issuer application type is now deprecated and will be removed in the future.

[Joezanini]

Guest creation via the Guest Issuer application type is now deprecated and will be removed in the future. Use Service App Guest Management instead

The current implementation of guest issuer tokens may need to be updated as a result of recent changes.

[adamweeks]

@Joezanini should we implement the new methods in the guest_issuer.py file?

I propose that we create a create_sa_guest function within that file that will create a guest via a service app. We probably need a service_app.py file as well to handle the fetching of service app tokens to be used with the create_sa_guest function.