public async Task <IActionResult> Run( [HttpTrigger(AuthorizationLevel.Anonymous, "get", Route = "created")] HttpRequestMessage httpRequest, ILogger log) { if (httpRequest is null) { throw new ArgumentNullException(nameof(httpRequest)); } var query = httpRequest.RequestUri.ParseQueryString(); var code = query["code"]; if (string.IsNullOrEmpty(code)) { throw new InvalidOperationException("Parameter 'code' is required in the query string."); } log.LogWarning($"GitHub code: {code ?? "null"}"); var app = await github .GetAppManifest(code) .ConfigureAwait(false); if (app is null) { return(new NotFoundObjectResult("Failed to get GitHub App Manifiest from GitHub.")); } return(new ContentResult { Content = Html(app), ContentType = "text/html" }); }