System.UriFormatException: Invalid URI: The hostname could not be parsed.
   at System.Uri.CreateThis(String uri, Boolean dontEscape, UriKind uriKind)
   at System.Uri..ctor(String uriString, UriKind uriKind)
   at System.Net.Http.HttpRequestMessage..ctor(HttpMethod method, String requestUri)
   at oauth_broker.Delegated.MultipleDelegatedOAuthTokenService.NewTarget(HttpContext ctx) in F:\Projects\Oauth-broker\oauth-broker\oauth-broker\Delegated\MultipleDelegatedOAuthTokenService.cs:line 429
   at oauth_broker.Delegated.MultipleDelegatedOAuthTokenService.HandleRequest(HttpContext ctx, RequestDelegate next) in F:\Projects\Oauth-broker\oauth-broker\oauth-broker\Delegated\MultipleDelegatedOAuthTokenService.cs:line 513