diff --git a/src/Sdk/WebApi/WebApi/OAuth/VssOAuthTokenHttpClient.cs b/src/Sdk/WebApi/WebApi/OAuth/VssOAuthTokenHttpClient.cs
index 994675e41..27ec89e09 100644
--- a/src/Sdk/WebApi/WebApi/OAuth/VssOAuthTokenHttpClient.cs
+++ b/src/Sdk/WebApi/WebApi/OAuth/VssOAuthTokenHttpClient.cs
@@ -54,6 +54,7 @@ namespace GitHub.Services.OAuth
             VssOAuthTokenParameters tokenParameters = null,
             CancellationToken cancellationToken = default(CancellationToken))
         {
+            // todo: qqq
             VssTraceActivity traceActivity = VssTraceActivity.Current;
             using (HttpClient client = new HttpClient(CreateMessageHandler(this.AuthorizationUrl)))
             {