End-user access to courses is controlled using groups. In order for a course to be visible in an end-users library, both the end-user and the course need to be a member of the same group.
How to add group members
From the Left Navigation menu choose Administration > Groups, and then select the group you wish to provide access to. You will be redirected to the group details page.
From the Available users list select and move users to the Group members list.
From the Available courses list select and move one or more courses to the Group courses list.
User who are members of this group will now see the course in their library.