public void AccessTokenServiceMakesAccessTokenFromRequest()
        {
            var config = A.Fake <IConfiguration>();
            var cat    = Guid.NewGuid().ToString();
            var dat    = Guid.NewGuid().ToString();

            config["ClientAccessToken"] = "";
            config["DarwinAccessToken"] = dat;
            var request = new BaseRequest {
                AccessToken = cat
            };
            var service = new AccessTokenService(A.Fake <ILogger <AccessTokenService> >(), config);

            var token = service.MakeAccessToken(request);

            Assert.Equal(cat, token.TokenValue);
        }