SteamID and Custom URL
You can find users on AStats based on SteamID64 or on the Steam custom URL.
If you don't know how to find yours, here is a simple way:
1. Goto Steamcommunity
2. Login and go to your profile.
3. Look at the URL
http://steamcommunity.com/profiles/NumberHere -> NumberHere is the number you need.
- Or if you have a custom URL.
http://steamcommunity.com/id/NameHere -> NameHere is the name you need.
You can even paste the entire URL in it and let AStats sort it out for you.
Note: Steam profiles must be set to public to be added.