public Pet CreatePet(Pet pet)
        {
            _context.Attach(pet).State = EntityState.Added;
            _context.SaveChanges();
            return(pet);

            /*var productToCreate = _context.Pets.Add(pet).Entity;
             * _context.SaveChanges();
             * return productToCreate;*/
        }
 public Owner CreateOwner(Owner owner)
 {
     _context.Attach(owner).State = EntityState.Added;
     _context.SaveChanges();
     return(owner);
 }