resolve providerUri on refreshToken

oauth3.core.js

@@ -587,6 +587,11 @@
       return OAUTH3.hooks.session.check(preq, opts).then(fetch);
     }
   , _requestHelper: function (preq, opts) {
+      /*
+      if (opts && opts.directives) {
+        preq.url = OAUTH3.url.resolve(opts.directives.issuer, preq.url);
+      }
+      */
       return OAUTH3._browser.request(preq, opts);
     }
   , implicitGrant: function(directives, opts) {
@@ -666,7 +671,8 @@
       return OAUTH3.discover(providerUri, opts).then(function (directive) {
         var prequest = OAUTH3.urls.refreshToken(directive, opts);
 
-        return OAUTH3.request(prequest).then(function (req) {
+        prequest.url = OAUTH3.url.resolve(providerUri/*directives.issuer*/, prequest.url);
+        return OAUTH3.request(prequest/*, { directives: directive }*/).then(function (req) {
           var data = req.data;
           data.provider_uri = providerUri;
           if (data.error) {
@@ -1071,6 +1077,7 @@
         }
         // TODO maybe use a baseUrl from the directives file?
         preq.url = OAUTH3.url.resolve(this._providerUri, preq.url);
+
         return OAUTH3.request(preq, opts);
       }
     , logout: function (opts) {