public async Task <IActionResult> PutRecipe(Guid id, RecipeDTO recipeDTO)
        {
            //1. checks : null , ids, exists, valid
            if (recipeDTO == null || id == null)
            {
                return(BadRequest());
            }

            if (id != recipeDTO.Id)
            {
                return(BadRequest());
            }

            Recipe recipe = mapper.Map <Recipe>(recipeDTO);

            recipe.Id = recipeDTO.Id;                                 //Indien Id Werd ignored in de mapper

            bool exists = await recipeRepo.Exists(recipe, recipe.Id); //asnotracking!

            if (!ModelState.IsValid)
            {
                return(BadRequest(ModelState));
            }

            //2. try update
            try
            {
                var result = await recipeRepo.Update(recipe); //new  in repo (niet meer generic)

                if (result == null)
                {
                    return(BadRequest("Onbestaande categorie"));
                }
                //await recipeRepo.SaveAsync();
            }
            catch (DbUpdateConcurrencyException)
            {
                if (!recipeRepo.Exists(recipe, recipe.Id).Result)
                {
                    return(NotFound());
                }
                else
                {
                    throw;
                }
            }

            return(NoContent());
        }