// ========================== MESSAGE HANDLERS - USER ============================

        // -------------------------------------------------------------------------------
        // OnUserLoginRequestMessage
        // @Client -> @Server
        // -------------------------------------------------------------------------------
        void OnUserLoginRequestMessage(NetworkConnection conn, UserLoginRequestMessage msg)
        {
            ServerPlayerListMessage message = new ServerPlayerListMessage
            {
                code             = successCode,
                text             = "",
                causesDisconnect = false
            };

            if (DatabaseManager.singleton.TryUserLogin(msg.username, msg.password))
            {
                NetworkManager.singleton.LoginUser(conn, msg.username);

                /*
                 * TODO:
                 * message.players
                 * message.maxPlayer
                 */

                eventListener.onUserLogin.Invoke(conn);
                message.text = systemText.userLoginSuccess;
            }
            else
            {
                message.text = systemText.userLoginFailure;
                message.code = errorCode;
            }

            conn.Send(message);
        }
 // -------------------------------------------------------------------------------
 // OnServerPlayerListMessage
 // @Server -> @Client
 // -------------------------------------------------------------------------------
 void OnServerPlayerListMessage(NetworkConnection conn, ServerPlayerListMessage msg)
 {
 }