I don't know for how long you could do this but I didn't find a thread and thought it might be helpful for those who need and/or rely on it or whatever.Go to http://accounts.nintendo.com and log in to your Nintendo account.Click on "Login and safety settings" (or whatever it's called in English) and you'll find the Two Factor Authentification option on the very bottom. It's self-explanatory from there on out.German screenshot for reference:It uses Google Authenticator, which I think is a pretty neat.Use it. Do it. Keep your account(s) safe.Lock if old and all that jazz.EDIT OH YEAH AN DYOU CAN ALSO CHANGE YOUR NAME HOW BOU DA