public void Response403()
        {
            var user    = DefaultConfig.FirstUser;
            var wallet  = api.GenerateWallet();
            var failApi = new SilaApi(DefaultConfig.environment,
                                      "3a1076bf45ab87712ad64ccb3b10217737f7faacbf2872e88fdd9a537d8fe266",
                                      DefaultConfig.appHandle);
            var response = failApi.RegisterWallet(user.UserHandle, user.PrivateKey, wallet, "fail_app");

            Assert.AreEqual(403, response.StatusCode, "Bad app signature status - RegisterWallet");
        }