code: def get_period_last_30_days() -> str:
      
      today = Datum()
      today.today()
      # start_date = today - timedelta(days=30)
      start_date = today.clone()
      start_date.subtract_days(30)
  
      period = get_period(start_date.value, today.value)
      return period
docs: Returns the last week as a period string