datastore: update to v1beta3

Author: stephenplusplus

lib/datastore/dataset.js

@@ -60,8 +60,7 @@ var DatastoreRequest = require('./request.js');
  * @private
  */
 var SCOPES = [
-  'https://www.googleapis.com/auth/datastore',
-  'https://www.googleapis.com/auth/userinfo.email'
+  'https://www.googleapis.com/auth/datastore'
 ];
 
 /**
@@ -136,7 +135,7 @@ nodeutil.inherits(Dataset, DatastoreRequest);
  * @param {string=} options.apiEndpoint - Custom API endpoint.
  */
 Dataset.determineApiEndpoint_ = function(options) {
-  var apiEndpoint = 'https://www.googleapis.com';
+  var apiEndpoint = 'https://datastore.googleapis.com';
   var trailingSlashes = new RegExp('/*$');
 
   if (options.apiEndpoint) {