With the release of Update 11, users are now required to register an SLG account attached to a Steam account that owns ECO.
Navigate to https://play.eco/login
Click the 'Login with Steam' option.
Login with your Steam account that owns ECO
Register your new SLG account.
Navigate to your server's control panel.
Click on the Command Line Manager icon
Click on the Default command line to edit it.
Enter your SLG account username and password, then save the changes.
Restart the server
