public IAsyncResult BeginCreateAuthorizationToken(GithubAuthorizationRequest request, AsyncCallback callback, object state)
 {
     throw new NotImplementedException();
 }
 public static GithubAuthorization CreateAuthorizationToken(this IGithubServiceManagement proxy, GithubAuthorizationRequest request)
 {
     return proxy.EndCreateAuthorizationToken(proxy.BeginCreateAuthorizationToken(request, null, null));
 }