added more information to request errors

oauth3.core.js

@@ -950,9 +950,12 @@
 
             if (data.error) {
               err = new Error(data.error.message || data.error_description || JSON.stringify(data.error));
+              Object.assign(err, data.error);
             }
             if (err) {
-              err.result = data;
+              err._request = xhr;
+              err.status = xhr.status;
+              err.data = data;
               reject(err);
               return;
             }