post https://gateway.stage.bill.com/connect/v3/users
Create a new user. The currently signed-in user must have the ADMINISTRATOR user role in the BILL organization to perform this operation.
When you create a user, BILL sends an email to the user for them to complete their sign-up. After user sign-up is complete, the user can access features in your BILL organization depending on the user role.
See Organizations and Users in the Guides section for more information, sample requests, and responses.