Ah oke.
In that case the only solution is to disable the 2 factor authentication so you can get in your system again or in your account.
To do this you need to acces your VPS/Server via SSH as root.
Go to:
/usr/local/directadmin/data/users/accountname/
where "accountname" is ofcourse the name of the account and then edit the user.conf in there and set:
twostep_auth=no
Just to be sure you could restart directadmin:
service directadmin restart
After that you should be able to login again and if needed create a new 2-step login.