ask user

 /**
     * Funtion Name: askUser
     * @param board
     * @return int[] row col
     * 
     * Inside the Function
     *      --> Pick a Row and column
     *      --> Loop to check if the spot is already taken
     *      --> if spot is already taken again pick a row and column 
     */
   public static int[] askUser(char[][] board){
      System.out.print("Pick a Row and Column: ");
      int row = sc.nextInt();
      int col = sc.nextInt();
      while(board[row][col]=='X' || board[row][col]=='O'){
        System.out.print("The Spot already taken: ");
        row = sc.nextInt();
        col = sc.nextInt();
      }
      return new int[] {row, col};
    }