From a Project dashboard, select Users

Add a user from the Select Users dropdown, choose a project role (Author, Administrator or User) from the Role dropdown, and click Ok.
Use x remove to remove a User from a Project.

To change a Project role for a User, use the x remove button and add them again with the new Project role
Now consider how you will enable access to data in your Project, there is some background information in the page Agent - Architecture for Data Access
Stuck on this step? Email support@eight-wire.com