BPF in Canvas App

[jrichview]

Disclaimer: I'm an experienced DOTNET dev who is new to Power Platform as of late 2021.

I got to this repo from a link in this blog post: https://powerapps.microsoft.com/en-us/blog/using-business-process-flows-in-a-canvas-app/

Our client has a need for their canvas app to move a salesorder record forward one stage in a BPF. Basically they need orders submitted in the canvas app to appear "completed" when viewed in their model-driven app, not stuck in an earlier stage. This led me to the above blog post, and I tried to follow installation instructions so I could review the code of the BPF component, but I ran into difficulties on the Azure AD app registration part.

All I need to know is how to create the custom connector so I can call the API to change the stage. I'm fairly familiar with the tables, and I already know how to find the process instance GUID for the order record. My Google-Fu has not led me to this information.

Can anyone explain or point me to a post that will get me going? The heat is on me at the moment, so I'm grateful for any helpful response. Thanks!