CSP_CREST.Services.CRESTService.GetRateCardAsync C# (CSharp) Метод

        public Task<RateCard> GetRateCardAsync()
        {
            string uri = string.Format("{0}/{1}/rate-card?OfferDurableId=MS-AZR-0145P", cspApiUrl, reseller_id);

            APIService service = new APIService(uri);

            service.Request.Headers.Add("api-version", "2015-03-31");
            service.Request.Headers.Add("x-ms-correlation-id", Guid.NewGuid().ToString());
            service.Request.Headers.Add("Authorization", "Bearer " + sa_token.access_token);

            return service.GetAsync<RateCard>();
        }