Hey boys & girls, I was just wondering if anyone knows how to update/changer authentication app for your trakt account?! I see where I can change my password but that’s it!? I appreciate any help/info! 
You mean if you wanna log in via Apple or Google?
That’s under settings, and then right away there’'s Quick Sign in.
I don’t think it’s possible on the app(s).
https://trakt.tv/settings