Scrape a MLBAM Data
        :param start: Start Day(YYYYMMDD)
        :param end: End Day(YYYYMMDD)

def _days(cls, start, end):
        """
        Scrape a MLBAM Data
        :param start: Start Day(YYYYMMDD)
        :param end: End Day(YYYYMMDD)
        """
        days = []
        # datetime
        start_day, end_day = dt.strptime(start, cls.DATE_FORMAT), dt.strptime(end, cls.DATE_FORMAT)
        delta = end_day - start_day

        for day in range(delta.days+1):
            days.append(start_day + timedelta(days=day))
        return days