Unable to log in
 

I've bought Assault Squad over steam, but I can't seem to be able to autenthicate it. It's all like ''CD key is already used.'', even though I can't recall using it.
Is it possible to show me the login name of whatever account I used, or something?

What is going on
 

I got men of war on humblebundle.com and I get message that my key is registered to another account. So because I was not sure if I got all things right in my gamespy accout set up I tried to log in to gamespy id but it moved me to IGN login page. I could have multiple names and now I don't know if I registered my key for another nickname. Can someone tell me how to get to gamespy account?

Look in this posting, where you can see the key