Sometimes we have to give people access to the courses in an account or a sub-account for inspection purposes. We can create an account for them, but we do want them to be able to access all courses so they can view them but not modify them. We don't want them to be visible as a member of the course. Is there a role that can be used for that? An admin role would be nice because then we don't have to add them one by one to all the courses.