public static void AddHttpClient(this IServiceCollection services, IConfiguration configuration)
{
TemplateConfig templateConfig = configuration.GetSection(TemplateConfig.TEMPLATE).Get <TemplateConfig>();
services.Configure <TemplateConfig>(configuration.GetSection(TemplateConfig.TEMPLATE));
HttpRestClient <DefaultHttpClientConfiguration <string> > apiClient = HttpRestClientFactory.Create <string>(templateConfig.BaseUrl, 3);
apiClient.AddDefaultHeader(HttpRequestHeaders.ContentType, ContentTypes.ApplicationJson);
apiClient.AddDefaultHeader(HttpRequestHeaders.Accept, ContentTypes.ApplicationJson);
apiClient.AddDefaultHeader("Ocp-Apim-Subscription-Key", templateConfig.SubscriptionKey);
apiClient.AddDefaultHeader("x-api-key", templateConfig.ApiKey);
services.AddSingleton(apiClient);
}