ApiShoppingList/API/DBModel/ShoppingList.cs

using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;

namespace API.DBModel
{
    [Table("shopping_lists")]
    public class ShoppingList
    {
        [Key]
        public int Id { get; set; }
        public string? Name { get; set; }

        [ForeignKey("FK_shopping_lists_User")]
        public int id_user { get; set; }

        List<ProductInShopList>? productInShopLists { get; set; }
    }
}