[login] Fix more crashes caused by not having both Twitch and Steam auth configured
[login] Fix more crashes caused by not having both Twitch and Steam auth configured

madmatt/nodecg,nodecg/nodecg,madmatt/nodecg,nodecg/nodecg,IgorCandido/igrcnddStreamNotifications,IgorCandido/igrcnddStreamNotifications,nodecg/nodecg