Adding Node "Connect as oneadmin"

I am trying to configure SSH to add a new node but I can’t su as oneadmin, or ssh as oneadmin, or login as oneadmin

I used a Minione install and don’t remeber setting the oneadmin pw, but I see it on the admin cosole and I can’t successfully cut and paste to ssh or su, and changing it in the web admin doesn’t seem to have any effect.
I have followed the install instriuctions that say you can cange the passwrod with anothe ruse of the oneadmin group but that doens’t work either (eg, oneuser --api oneadmin newpass) or what ever they are psecifcally just results in oneuser unknown command
I am not actaully use “one user” I am using a use in the oneadmin group.

any help appreciated!