func (s *Service) UnenrollMembership(
	ctx  context.Context,
	accountID  string,
) error {
	s.membershipRepo.UnenrollMembership(
		ctx,
		accountID,
	)
	if err != nil {
		return err
	}
	
	s.produceUnenrollmentEvent(ctx, accountID)
}

func (s *ChannelMembershipRepo) UnenrollChannelMembership(ctx context.Context, accountID string) error {
	params  :=  db.UpdateMembershipEndTimeParams{
		AccountID: accountID,
		EndAt: sql.NullTime{
			Time: time.Now(),
			Valid: true,
		},
	}
	err  :=  s.queries.UpdateMembershipEndTime(ctx, params)
	if  err  !=  nil {
		return  err
	}
	return nil
}

/* name: UpdateEnrollmentChannelMembershipEndTime :exec */ 
-- UpdateEnrollmentChannelMembershipEndTime for any row of a given account_id with NULL end_time, updates the end_time 
-- to the given time 
UPDATE membership SET end_at = sqlc.arg(end_at) WHERE account_id = ? AND (end_at IS NULL OR end_at > sqlc.arg(end_at));