Add Server Password

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 PASSWORD. When you find this box, click on it and add your new server password.
// Photos to be added on AH 2.0
After Completing these steps, you can now go and start you server.