public IObservable<Unit> TestUserNameAndPassword()
{
var client = new RestClient("https://api.github.com");
client.Authenticator = new HttpBasicAuthenticator(User, Password);
return client.RequestAsync<GitHubUser>(new RestRequest("user"))
.Do(res => this.Log().Info("User's URL: {0}", res.Data.url))
.Select(_ => Unit.Default);
}