Fix the userId checking, so that login is optional (previously anonymous page views would give an error, ouch)
Fix the userId checking, so that login is optional (previously anonymous page views would give an error, ouch)

fzzzy/pageshot,mozilla-services/pageshot,fzzzy/pageshot,mozilla-services/screenshots,mozilla-services/screenshots,mozilla-services/pageshot,mozilla-services/screenshots,mozilla-services/pageshot,fzzzy/pageshot,mozilla-services/pageshot,fzzzy/pageshot,mozilla-services/screenshots