How to find your Steam64 ID
For many whitelists or other admin commands you need your Steam64 ID. This is how you can find it out
- Open Steam
 - Go to your account and click on 
Accountsdetails. - Under the heading 
Account from ...you will find your Steam-ID 
Alternatively you can find out your Steam64-ID by using a tool like https://steamid.io/. Just enter your original Steam username and the tool will show you your Steam64 ID.