public static string StopPlaying(IGuildUser user)
        {
            if (!GameIsInProgress())
            {
                return(errGameNotInProgress);
            }

            if (!UserIsInGame(user))
            {
                return(errUserNotPlaying);
            }

            player1 = null;
            player2 = null;
            TicTacToe.ResetGame();
            return(sucGameStopped);
        }
 public static void ForceGameRestart()
 {
     player1 = null;
     player2 = null;
     TicTacToe.ResetGame();
 }