If I'm using the API via a publisher account, what functionality am I restricted to?
See the role-functionality matrix in the documented below:
Levels, roles, and privileges—Portal for ArcGIS (10.6) | ArcGIS Enterprise
I'm trying to add/remove users to groups that I own, is that restricted to the admin role in the API? I'm getting 'notAdded' and 'notRemoved' for users that I can manually add and remove via AGOL web interface.