Create and manage users.
Users can be divided into four categories: Factory, Admin, SuperUser and User. The Factory user can administer Admin, SuperUser and User users. The Admin user can administer SuperUser and User users, and so on.
To add new user, use the + icon buttons on the right side. Each user must have a unique name regardless of the category they belong to.
To remove a user, use the trash icon buttons on the right side.