There are three types of users within the Disco platform that have a variety of different permissions to power your course experience: Learners, Community Admins, and Course Teachers (In Labels you can change all of these titles).
A Community Admin is the most powerful level of access. They can add Stripe accounts, add and delete courses, and more. Course admins can also be a teacher. At a minimum, there must be one Community Admin for your community.
The course participants have access to courses they are registered for. They can make comments and submit assignments. However, they cannot add events or change other aspects of the course.