Backup codes option for two factor authentication is now available. 
To turn on backup authentication, navigate to your user preferences → account. You’ll have to have primary 2fa authentication (TOTP) set up in order to access backup codes setting.
In order to enable, regenerate and disable backup codes, you’ll need to first authenticate with your Authenticator app.
You’ll be provided with 10 codes you can use when primary authentication method is not available:
