public IHttpActionResult Post(CocktailCreate model)
        {
            if (!ModelState.IsValid)
            {
                return(BadRequest(ModelState));
            }

            if (_service.GetByName(model.Name) != null)
            {
                return(Conflict());
            }

            if (!_service.IsLiquorInDatabase(model.LiquorsInCocktail))
            {
                return(InternalServerError(new SystemException("Liquor is not in database.")));
            }

            if (!_service.AddCocktail(model))
            {
                return(InternalServerError());
            }

            return(Ok());
        }