@Override
  public ClubMember findClubMember(int clubNo, String email) {
    //
    Club club = clubDao.readClub(clubNo);
    if (club == null) {
      throw NamooClubExceptionFactory.createRuntime("클럽이 존재하지 않습니다.");
    }

    return memberDao.readClubMember(clubNo, email);
  }
  @Override
  public List<Club> findBelongClubs(String email, int comNo) {
    //
    List<Club> clubs = clubDao.readAllClubs(comNo);
    if (clubs == null) return null;

    List<Club> belongs = new ArrayList<>();

    for (Club club : clubs) {
      if (memberDao.readClubMember(club.getClubNo(), email) != null) {
        belongs.add(club);
      }
    }
    return belongs;
  }