test.cs

using System.Collections;
using System.Collections.Generic;
using Discord;
using UnityEngine;

public class DiscordController : MonoBehaviour
{
  public Discord.Discord discord;
  public Discord.LobbyManager lobbyManager;
  public System.Int64 lobbyId;
  private bool created = false;
  private bool updated = false;

  public void OnClick()
  {
    for (int i = 0; i < lobbyManager.MemberCount(lobbyId); i++)
    {
      var userId = lobbyManager.GetMemberUserId(lobbyId, i);
      lobbyManager.SendNetworkMessage(lobbyId, userId, 1, System.Text.Encoding.UTF8.GetBytes("Hello!"));
      Debug.Log("Sent message to " + userId);
    }
  }

  // Use this for initialization
  void Start()
  {
    discord = new Discord.Discord(MY_CLIENT_ID, (System.UInt64)Discord.CreateFlags.Default);
    discord.SetLogHook(Discord.LogLevel.Debug, (Discord.LogLevel level, string message) =>
    {
      Debug.Log(message);
    });

    lobbyManager = discord.GetLobbyManager();

    lobbyManager.OnNetworkMessage += (lobbyId, userId, channelId, data) =>
    {
      Debug.Log(string.Format("{0} - from {1} on channel {2}: {3}", lobbyId, userId, channelId, System.Text.Encoding.UTF8.GetString(data)));
    };

    lobbyManager.OnMemberUpdate += (lobby_Id, userId) =>
    {
      var route = lobbyManager.GetMemberMetadataValue(lobby_Id, userId, "$route");
      Debug.Log(route);
      if (route != null && updated == false)
      {
        updated = true;
        Debug.Log("here");
        lobbyManager.OpenNetworkChannel(lobbyId, 1, false);
        Debug.Log("opened channel");

      }
    };

    if (!created)
    {
      var txn = lobbyManager.GetLobbyCreateTransaction();
      txn.SetCapacity(5);
      txn.SetType(Discord.LobbyType.Public);
      lobbyManager.CreateLobby(txn, (Discord.Result res, ref Discord.Lobby lobby) =>
      {
        if (res == Discord.Result.Ok)
        {
          Debug.Log(lobbyManager.GetLobbyActivitySecret(lobby.Id));
          lobbyId = lobby.Id;
          created = true;
          lobbyManager.ConnectNetwork(lobbyId);
        }
      });
    }
  }
  // Update is called once per frame
  void Update()
  {
    discord.RunCallbacks();
  }

  void LateUpdate()
  {
    lobbyManager.FlushNetwork();
  }
}