Project users works for the projects with access privileges like view the milestones, add/edit tasks, upload files in a project, post a topic in forums. The project user can be a Admin, Managere or Employee.
In Projects, select a project and then select Users. You can view the existing project users, if any. In Users tab, click the Plus icon at the top right corner, and specify the user details to add.
An invite mail is sent to the added project user along with the login credentials.
You can edit or delete a project user. Hover the mouse over the selected user to enable the Edit and Delete option. You can also choose to Follow or Unfollow a project user.