/// <summary>
/// Add the Slack client to the service collection as a singleton.
/// </summary>
/// <param name="services">The service collection.</param>
/// <param name="config">The slack configuration.</param>
/// <returns>The passed service collection.</returns>
public static IHttpClientBuilder AddSlack(this IServiceCollection services, SlackConfig config)
{
services.AddSingleton(config);
return(services.AddHttpClient <ISlackClient, SlackClient>());
}
public SlackClient(SlackConfig config, HttpClient httpClient)
{
_config = config ?? throw new ArgumentNullException(nameof(config));
_httpClient = httpClient;
}