docs: async def runs(self, date: datetime.date = None, days: int = None) -> list:
          """Return all program runs for X days from Y date."""
          endpoint = 'watering/past'
  
          if date and days:
              endpoint = '{0}/{1}/{2}'.format(
                  endpoint, date.strftime('%Y-%m-%d'), days)
  
          data = await self._request('get', endpoint)
          return data['pastValues']