public static TwilioController GetInitialisedTwilioController(IExternalSmsService externalSmsService)
        {
            var controller = new TwilioController(externalSmsService)
            {
                Request = new HttpRequestMessage { RequestUri = new Uri("http://localhost/api/") },
                Configuration = new HttpConfiguration()
            };

            controller.Configuration.MapHttpAttributeRoutes();
            controller.Configuration.EnsureInitialized();

            return controller;
        }
        public TwilioController(IExternalSmsService externalSmsService)
        {
            Check.If(externalSmsService).IsNotNull();

            _externalSmsService = externalSmsService;
        }