public async Task <string> GetChallengeForm(SupportServiceResourceKey resourceKey, SupportServiceResourceKey challengeKey, string id, string url) { var challenge = _serviceConfiguration.GetChallenge(challengeKey); if (challenge == null) { var e = new NullReferenceException($"The challenge {challengeKey} could not be found in any manifest"); _log.Error(e, $"The Manifest data is misconfigured because a Challenge was identified but not configured, please review the Manifest configuration and update it accordingly."); throw e; } var challengeUrl = string.Format( new Uri(_serviceConfiguration.FindSiteBaseUriForManfiestElement(_sites, challengeKey), challenge.ChallengeUrlFormat).ToString(), id); var page = await GetPage(challengeUrl); return(_formMapper.UpdateForm(resourceKey, challengeKey, id, url, page.Resource)); }