@Xiang ZHU​ ,

Okay, I am very close to being able to change the git credential for my Service Principal. My inital error was that, the service principal didn't have the correct permissions to view the Repo. I suspect this has changed because of the change in the PAT token (it used to work before).

How do I leverage the Git Credentials API to make this change? Do i use Postman, or something similar?

Apologies for the low-level question here.