public IHttpActionResult GetAccessToken([FromUri] string code, [FromUri] string shop)
        {
            var shopName = shop.Replace(".myshopify.com", "");
            var service  = new ShopifyService();
            var token    = service.GetAccessToken(code, shopName);

            return(Ok(token)); // Returns 401 if our App is'nt installed or the Token is invalid
        }