When Autodesk API Auth Fails

I have an app that uses authorization to access Autodesk Construction Cloud (ACC) and all of a sudden it did not work when authorizing.

I searched with Gemini and ChatGPT to try to find what the problem was. I did not directly find the correct answer but eventually with Gemini Deep Research I got a clue.

I was eventually able to find a page that explained what happened. Autodesk had changed its whole system for application registering to something they call hubs.

https://aps.autodesk.com/blog/how-create-developer-hub-and-migrate-your-applications explains how to make things work again. Video by Autodesk is at https://youtu.be/ee_p29UUUvo?t=270

I created a new hub and gave it a credit card even though it’s “free” and then migrated apps to it.

https://aps.autodesk.com/hubs/@personal/applications is the old page for managing Autodesk apps. The new one is at https://aps.autodesk.com/hubs

My apps worked right away without any changes in their code after the migration.