Unity's network manager contains several functions used for interacting with a matchmaking system that allows hosts to list their games on the Internet and potential players to find them. This is what will let players join and play games with others without needing to know the host's IP address.
We'll build out a JoinCanvas menu in this section, allowing you to search for games instead of just creating them, but first we need to modify our hosting functions to post data to the matchmaking server.
To use the matchmaker, we'll have to explicitly initialize it in code first. Add two using statements to the top of your NetworkGameManager script to include the Match and Types namespaces:
unity UnityEngine;
using System.Collections;
using UnityEngine.Networking;
using UnityEngine.Networking.Match;
using UnityEngine.Networking.Types;
using UnityEngine.UI;Next, add the following line to Start in the NetworkGameManager...