Have you tried "remember this computer"? https://na.alienwarearena.com/account
^You have to re-enable it every once in awhile (10~20 days?) but it works for me.
It would be nice if you could make it so you don't have to go to your email every time you try to sign in, to retrieve the 2-Fac Code why not just make it so you have to enter it once and the site remembers your IP address for example or i don't know read your cookies or something anything to confirm that it's you signing in. It would be a lot better cause of right now it doesn't matter what you do if you have 2-Fac It automatically signs you out and you have to login everytime and enter the code which is annoying.