How to create an AAD service principal (app registration) for the Power Automate service

#1 Power Automate CI/CD - how to create a service principal for the Power Automate service

Note: I've not finished the tutorial that explains how to resubmit, but I'm working on that.

Series:
#1 Power Automate CI/CD - how to create an AAD service principal (app registration) for the Power Automate service
#2 Power Automate CI/CD - how to create a custom connector to cancel a flow run
#3 Power Automate CI/CD - how to cancel Power Automate flow runs