Sooo  I think I followed the setup for the G Suite setup.  I was able to get through all of the Google steps, but when I try to setup the ADManager Plus end, I am getting stuck. 

I cannot figure out what to use as the User Name.  I figure it is the name before the @ in the Service Account EMail.  I have tried it with spaces instead if dashes. and every variation I can think of.

Any help is appreciated.