Hello!
I had break from wow fro few months i came back suprised my account still exist i logged in web/froum easilly and i can see my 2 chars in icecrown realm ,however when i try log in game it ask me for autenthicator code or so which it wasn't there before .
I made sure realmlist is correct but it still ask me for thic code can any1 help?
You get 2FA codes on your email by default.
You can either disable it ingame (not recommended), disable it completely (also not recommended) or you can check your email for the code.