public void Handle(MovieWatched @event)
        {
            _historyRepository.AddNewEntry(@event);
            List <Promotion> activePromotions = _promotionRepository.GetActivePromotions();

            foreach (var promotion in activePromotions)
            {
                promotion.GrantBenefit(new Visitor(@event.UserId), _historyRepository, _promotionCodeGenerator);
            }
        }