They change it again. At this moment documentation does not fit actual situation.. Commonly all works as expected with one small difference. Login from Devices config now moves to Products -> Facebook Login.. So you need to: get your App id from headline,; get Client Token from app Settings -> Advanced.There is also Native or desktop app? question/config. I turn it on.
https://stackoverflow.com/questions/16860372/use-device-login-on-smart-tv-console

