You cannot delete the repository administrator. Follow the instructions below to delete all other users.
To delete a user
Log on to the Repository Manager.
From the Navigation View, double-click Users to open a list of all users in List View.
Right-click the name of the user you want to delete and select Delete from the drop-down menu option.
You are prompted to confirm the delete: Are you sure you want to delete this User?
Click Yes to delete the user.