Only admin users can add other users to a studio.
To add a user:
Click the Studio Logo (bottom left)
Click People
Click Invite User
User types
When adding users to your studio, you can choose from 3 access levels:
Producer: this is the standard user who can do anything, but cannot update Studio settings and invite users
Admin: can do everything a producer can, plus change studio settings and invite users
Maker: can't download or share unapproved edits. Create and edit projects, then submit for approval. Approved edits can be downloaded or shared.