public ActionResult DocuSign(string url)
        {
            if (!string.IsNullOrEmpty(url))
            {
                DocuSignModel = new DocuSignViewModel()
                {
                    EmbeddedUrl = url,
                    Message = string.Empty
                };
            }

            return View(DocuSignModel);
        }
        public ActionResult Message(string @event)
        {
            if (@event == "signing_complete")
            {
                DocuSignModel = new DocuSignViewModel()
                {
                    EmbeddedUrl = string.Empty,
                    Message = "Thank you for Signing!"
                };
            }
            else if (@event == "decline")
            {
                DocuSignModel = new DocuSignViewModel()
                {
                    EmbeddedUrl = string.Empty,
                    Message = "Something wrong."
                };
            }

            return View(DocuSignModel);
        }