Short description
Sometimes for some special macros it is wanted to call that macro internal by a special user. This user should not be able to login "never login" similiar to a unix user account which you can configure for that.
If you have a protected wiki and you want to parse content on a page by a user with no rights you can do this by overwriting the given user object by a user whith default read rights. This is useful if you like to show results in some automated way by a macro or parser and if you don't want to write the public pages yourselfs.