I'm wondering the same as I have some on the way.
It has a RPi as controller, right? Maybe this would work? Take out the SD card, plug it in another Linux system, make an additional user with root privileges (visudo -f to specify the correct file), edit the ssh config file (/etc/ssh/sshd_config) to allow that user to connect (AllowUsers). Make a backup of the SD card first and don't blame me if it goes wrong