I'm not sure if I actually shared my private SSH key with the Developer the first time. However, I followed the directions from the link you provided. Everything appeared successful; nonetheless, the Developer repeatedly advised that I needed to provide the correct host name. ??? I had provided the IP Address which is what I use as the host name in FileZilla.
I'm not sure if I have restricted remote connections using SSH to any specific IP address using the AWS console firewall. I don't recall setting anything up! By the way, I'm behind a Sucuri firewall which provides a different IP address in my DNS. Could that be the issue? ???
Thanks for you help!