public async void CheckOrdersTokenAsync()
        {
            IEcwidOrdersClient client = new EcwidClient(_credentials)
            {
                Settings =
                {
                    ApiUrl = "http://www.mocky.io/v2/57209e300f0000f208387249" //response with one order and limit = 1.
                }
            };

            var result = await client.CheckOrdersTokenAsync();

            Assert.Equal(true, result);
        }
        public async void CheckOrdersAuthAsyncFail()
        {
            IEcwidOrdersClient client = new EcwidClient(_credentials)
            {
                Settings =
                {
                    ApiUrl = "http://www.mocky.io/v2/56fa70921100009b28a72180"
                             //empty set with count, total and 403 code
                }
            };

            var result = await client.CheckOrdersTokenAsync();

            Assert.Equal(false, result);
        }