public static Seller UpdateSeller(Seller seller, NewUpdateSeller updateSeller)
        {
            seller.Firstname = updateSeller.Firstname;
            seller.Lastname  = updateSeller.Lastname;
            seller.Email     = updateSeller.Email;
            seller.Phone     = updateSeller.Phone;
            seller.StoreIds  = updateSeller.StoreIds;

            return(seller);
        }
 public static Seller CreateSeller(NewUpdateSeller newSeller)
 {
     return(new Seller
     {
         Id = Guid.NewGuid().ToString(),
         Firstname = newSeller.Firstname,
         Lastname = newSeller.Lastname,
         Email = newSeller.Email,
         Phone = newSeller.Phone,
         StoreIds = newSeller.StoreIds
     });
 }