public void OnServerAddPlayer(NetworkConnection conn, short playerControllerId, NetworkReader extraMessageReader)
{
LoginMessage login = new LoginMessage();
login.Deserialize(extraMessageReader);
Debug.Log("playerControllerId = " + login.username + " with player id " + playerControllerId + " logged in!");
GameObject player = (GameObject)GameObject.Instantiate(playerPrefab);
playerInfoManager.userLogin(login.username, player);
NetworkWriter writer = new NetworkWriter();
serverMap.mapData.Serialize(writer);
NetworkServer.AddPlayerForConnection(conn, player, playerControllerId);
serverMap.TargetSetAndApplyMap(conn, writer.AsArray());
}