public async Task <List <BookResponse> > GetListOfBooksInWishList(int userID, int wishListID)
 {
     try
     {
         if (wishListID <= 0 || userID <= 0)
         {
             return(null);
         }
         else
         {
             return(await _wishListRepository.GetListOfBooksInWishList(userID, wishListID));
         }
     }
     catch (Exception ex)
     {
         throw new Exception(ex.Message);
     }
 }