public void GetAuthorizationHeader_ReturnsBase64EncodePublicAndPrivateKeys()
        {
            BraintreeService service = new BraintreeService(new Configuration(
                Environment.DEVELOPMENT,
                "integration_merchant_id",
                "integration_public_key",
                "integration_private_key"
            ));
            Assert.AreEqual("Basic aW50ZWdyYXRpb25fcHVibGljX2tleTppbnRlZ3JhdGlvbl9wcml2YXRlX2tleQ==", service.GetAuthorizationHeader());

        }