No I have an official premium test account.
I've just tested it again and on my first login via API I got this response:
Code:
{"message":"Flood detected: IP Locked #38","status":"KO"}
If you ask me this is a serverside issue which should be reported to their Support so they can fix it.
Possible workaround:
Disable 1fichier API, disable 2-factor-auth in your 1fichier account, add your 1fichier account via username + password to JDownloader.
-psp-