The user ID will be "root".
Password would have been set at the time you keyed the Receiver to your ESM.
Thank you so much. You have no idea how much time you just saved me.
I think its proper to give some context to this question for just in case someone else runs into this issue.
As a result of doing some testing, I ended up deleting one of my recievers. I was not able to simply re-add the reciever through the wizard. I called support and the told me I had to follow the instructions of the KB article below to run a recovery CD.
Once this part is done I would have had to boot to the CD or USB stick and run the command below:
cat /etc/NitroGuard/factory-id_rsa.pub > /root/.ssh/authorized_keys2
Luckily I was still able to ssh to the reciever, I just wasnt sure what the credentials were. Once I was able to use the root credentials specified in the answer, I was able to run the comand above, and re-add the reciever.