No support for Two-Factor-Auth?

[PHPGangsta]

Hello,

as far as I can see, 2fa is not supported, I get this error:
An inwx api call failed: The inwx api did return an error: method=nameserver.list, msg=Authentication error, reason=You need to unlock your account with your mobile TAN.

It would be nice if I could provide the sharedSecret of the Authenticator, and letsencrypt-inwx would automatically generate a code from that and use it to "unlock the account".

See:
https://github.com/inwx/php-client/blob/043244748b363a917a0c035da38d07ff01306d5e/src/Domrobot.php#L359
https://github.com/oGGy990/certbot-dns-inwx