http://wiki.opengarden.org/@api/deki/users/authenticate?authprovider=12

<exception><type>MindTouch.Dream.DreamResponseException</type><message>Unable to authenticate with AUTH service of type http://services.mindtouch.com/deki/draft/2007/05/drupal-authentication at local://662e94af90c44f9bb5a3cb6426f61d69/deki/services/default/12</message><source>mindtouch.deki</source><stacktrace><frame>MindTouch.Deki.Logic.ExternalServiceSA.BuildUserFromAuthService (MindTouch.Deki.ServiceBE serviceInfo, MindTouch.Deki.UserBE knownUser, System.String usernameToBuild, System.String authusername, System.String password) [0x00000]</frame><frame>MindTouch.Deki.Logic.AuthBL.Authenticate (MindTouch.Dream.DreamContext context, MindTouch.Dream.DreamMessage request, UInt32 serviceId, Boolean autoCreateExternalUser, Boolean allowAnon) [0x00000]</frame><frame>MindTouch.Deki.DekiWikiService.SetContextAndAuthenticate (MindTouch.Dream.DreamMessage request, UInt32 serviceid, Boolean autoCreateExternalUser, Boolean allowAnon) [0x00000]</frame><frame>MindTouch.Deki.DekiWikiService+&lt;PostUserAuth&gt;d__62.MoveNext () [0x00000]</frame><frame>MindTouch.Dream.Coroutine+&lt;&gt;c__DisplayClass2.&lt;Iterate&gt;b__0 () [0x00000]</frame><frame>MindTouch.Dream.Task.Execute (System.VoidHandler handler, MindTouch.Dream.TaskBehavior behavior) [0x00000]</frame></stacktrace><message><status>500</status><headers><Cache-Control>no-cache</Cache-Control><Content-Type>application/x-dream-exception+xml; charset=utf-8</Content-Type></headers><body format="xml"><exception><type>System.NotSupportedException</type><message>could not resolve: local://PeteE:*****@662e94af90c44f9bb5a3cb6426f61d69/deki/services/default/12/users/PeteE</message><source>mindtouch.dream</source><stacktrace><frame>MindTouch.Dream.Plug.InvokeAsync (System.String verb, MindTouch.Dream.DreamMessage request, MindTouch.Dream.Result`1 response) [0x00000]</frame><frame>MindTouch.Dream.Plug.InvokeAsync (System.String verb, MindTouch.Dream.DreamMessage request) [0x00000]</frame><frame>MindTouch.Dream.Plug.GetAsync () [0x00000]</frame><frame>MindTouch.Deki.Logic.ExternalServiceSA.BuildUserFromAuthService (MindTouch.Deki.ServiceBE serviceInfo, MindTouch.Deki.UserBE knownUser, System.String usernameToBuild, System.String authusername, System.String password) [0x00000]</frame></stacktrace></exception></body></message></exception>