docs: async def report_winner(self, winner: Participant, scores_csv: str):
          """ report scores and give a winner
  
          |methcoro|
  
          Args:
              winner: :class:Participant instance
              scores_csv: Comma separated set/game scores with player 1 score first (e.g. "1-3,3-0,3-2")
  
          Raises:
              ValueError: scores_csv has a wrong format
              APIException
  
          """
          await self._report(scores_csv, winner._id)