Good morning:
Transitioning to short-lived token with a snag. The "no expiration" token currently used in the 10-person dev environment is working perfect to upload/download/save, etc.... files/folders in a shared teams environment.
Got oauth2 working for me and my other user with Team Administrator access. The app must obviously have scoped access to the shared folders:

I bought another business license to create a test user without teams admin access and (like my other 8 users). Without admin access, I cannot register the app. I get this error:

I use the DBX API for an intranet and manage access through Azure AD so I have precise control of how folders are created, files saved, etc.... I'd like the API available to regular business DBX users without making them Team Administrators. I'm skirting this right now in production with the non-expiring token but those days are numbered.
Any ideas? Thanks in advance.