Hi, I don't think that changed between V10 and V11 - I've always done it by accessing the Site's Stats, then going into the Config and editing that user!?
https://1drv.ms/i/s!AipdkXTy6qQriRGjhJ__uuFzSSal
(Neither embedded screen shots nor the "link" function works properly on this forum. Anyone remember a Telex machine with a paper stripe?)