Change Max Player Count

Before following these steps, make sure to stop your server first. This is to avoiding breaking anything on your server while you edit. 

Step 1: Head to your game panel and look for your Startup icon on the left hand side.
// Photos to be added on AH 2.0

Step 2: Look for the box that says [SERVER] Max Players. When you find this box, click on it and change it to how many player you want.

Max player count is 16. For every person that joins your server, it will use more CPU and Ram.

// Photos to be added on AH 2.0

After Completing these steps, you can now go and start you server.