public static void ThrowIfError(HttpResponseMessage response, dynamic json)
        {
            if (json == null) return;

            if (!JsonHelpers.ContainsProperty(json, Constants.ErrorProperty)) return;

            var error = json[Constants.ErrorProperty];
            if (string.IsNullOrWhiteSpace(error)) return;

            CexApiException exception;

            if (error == Constants.NonceMustBeIncremented)
            {
                exception = new CexNonceException(response, Constants.NonceMustBeIncremented);
            }
            else if (error == Constants.PermissionDenied)
            {
                exception = new CexPermissionDeniedException(response, Constants.PermissionDenied);
            }
            else if (error == Constants.InvalidApiKey)
            {
                exception = new CexInvalidApiKeyException(response, Constants.InvalidApiKey);
            }
            else
            {
                exception = new CexApiException(response, error);
            }

            throw exception;
        }
        public static void ThrowIfError(HttpResponseMessage response, dynamic json)
        {
            if (json == null)
            {
                return;
            }

            if (!JsonHelpers.ContainsProperty(json, Constants.ErrorProperty))
            {
                return;
            }

            var error = json[Constants.ErrorProperty];

            if (string.IsNullOrWhiteSpace(error))
            {
                return;
            }

            CexApiException exception;

            if (error == Constants.NonceMustBeIncremented)
            {
                exception = new CexNonceException(response, Constants.NonceMustBeIncremented);
            }
            else if (error == Constants.PermissionDenied)
            {
                exception = new CexPermissionDeniedException(response, Constants.PermissionDenied);
            }
            else if (error == Constants.InvalidApiKey)
            {
                exception = new CexInvalidApiKeyException(response, Constants.InvalidApiKey);
            }
            else
            {
                exception = new CexApiException(response, error);
            }

            throw exception;
        }