private static IServiceCollection CreateServices()
        {
            var services = new Microsoft.Extensions.DependencyInjection.ServiceCollection();

            services.AddOptions();
            services.AddLogging((builder) => {
                builder.AddConsole();
            });
            services.AddHttpClientGenerator((configure) => {
                configure.AddConfiguration("github", (httpClientConfiguration) => {
                    httpClientConfiguration.BaseAddress = "https://www.github.com";
                });
            });
            return(services);
        }