The Super User or System Administrator is the highest position in the User ranking. This position is "magic" and cannot be given to any other user.
This User is created during the installation of your community, that's why his rights are community dependend. For security reasons, the users name and password are free choosable during installation.
The Super User has all permissions on all items and owns all available group permissions. Note: These rights cannot be changed!
- anonymous_user - the other available "magic" user