fixed broken auth for staff users

Signed-off-by: Sweil <mail@sweil.de>
index on alix6_neu: 0bf59c8 Merge branch 'alix6_neu' of github.com:Sweil/Frogsystem-2 into alix6-bugfixes
On alix6_neu: wrong branch
Merge commit '4b86266f039bfcc7c04b896fc3809187e4f6fd4c' into alix6-bugfixes
fixed wrong link creation

Signed-off-by: Sweil <mail@sweil.de>