使用javascript获取gmail联系人Google Contacts API

它总是说您请求的页面无效.我如何使用谷歌联系人api获取联系人我有有效的范围和客户端ID

google.load('gdata', '2.x');
    debugger
    google.setOnLoadCallback(function () {
        if (window.location.hash == "") {
            if (!checkLogin()) {
                logMeIn();
            } else {
                var feedUrl = "https://www.google.com/m8/feeds/contacts/default/full";
                query = new google.gdata.contacts.ContactQuery(feedUrl);
                query.setMaxResults(5000);
                myService = new google.gdata.contacts.ContactsService('exampleCo-exampleApp-1.0');
                myService.getContactFeed(query, function (result) {
                    document.cookie = "g314-scope-0=";
                    window.opener.parseGmailContacts(result.feed.entry);
                    close();
                }, function (e) {
                    alert(e.cause ? e.cause.statusText : e.message);
                });
            }
        }
    });
    function logMeIn() {
        scope = "https://www.google.com/m8/feeds";
        var token = google.accounts.user.login(scope);
    }
    function logMeOut() {
        google.accounts.user.logout();
    }
    function checkLogin() {
        scope = "https://www.google.com/m8/feeds/";
        var token = google.accounts.user.checkLogin(scope);
        return token;
    }

我认为有问题

  var token = google.accounts.user.checkLogin(scope);
            return token;

令牌返回""(此处为空值),如何获取令牌的值以获取联系人,PLZ帮助