public static GetCardResponse FromCardEntity(Card card)
        {
            var cardResponse = new GetCardResponse
            {
                CardId      = card.CardId
                , FrontText = card.FrontText
                , BackText  = card.BackText

                , CreatedAt = card.CreatedAt
                , UpdatedAt = card.UpdatedAt
            };

            return(cardResponse);
        }
 public static IList <GetCardResponse> FromCardEntity(IList <Card> cards) => cards.Select(c => GetCardResponse.FromCardEntity(c)).ToList();