Volumio 2 SSH Root Account

Well I tryed today wit a freshly flashed version:

volumio-2.129-2017-03-23-pi.img

but all mentioned user/password combinations fail:

volumio/volumio
root/root
root/volumio
pi/rasbian
pi/rasberry
pi/volumio

I just want to add some radio stations and maybe use the unused 15GB of SD-Space to store some music there!

how can this be done?

I tryed to mount the and put my ssh-pubkey there but couldn’t figure out where it should live.

Regards