Enter a steam API key

Without a Steam Web API key, some players cannot join and the console shows a steam API key error.

<ol><li>Go to steamcommunity.com/dev/apikey and log in with your Steam account.</li><li>Enter a domain name (for example game.CyberNex.net).</li><li>Copy your KEY.</li><li>In the game panel, click Startup.</li><li>Paste the key into the Steam Web Api Key box and save.</li><li>Restart the FiveM server.</li></ol>

The domain you enter is not used for the connection - any domain works, so you can use your server address.