code: async def set_start_date(self, date: str, time: str, check_in_duration: int = None):
          
          date_time = datetime.strptime(date + ' ' + time, '%Y/%m/%d %H:%M')
          res = await self.connection('PUT',
                                      'tournaments/{}'.format(self._id),
                                      'tournament',
                                      start_at=date_time,
                                      check_in_duration=check_in_duration or 0)
          self._refresh_from_json(res)
docs: set the tournament start date (and check in duration)
  
          |methcoro|
  
          Args:
              date: fomatted date as YYYY/MM/DD (2017/02/14)
              time: fromatted time as HH:MM (20:15)
              check_in_duration (optional): duration in minutes
  
          Raises:
              APIException