Fusion Field Service User Creation/Updates via API

Summary: With the introduction to fusion field service, is there a way to support creating the users via API, and setting their information appropriately? For instance, I'd like to create the user (i.e. the Manage Users task in Fusion), set the role and such and then run the IDCS sync process. After that I'd like to be able to potentially set all their details (Work Zones, Work Skills, so on) via API.

Is there a best practices or a document, or any other details I might be able to utilize? My environment is ONLY Fusion Field Service.

From my understanding these need to be created as a Person record (i.e. via the Manage User Task) which, if I make them via ResourceUser endpoints and such they do not show in the Manage User Task.