Получение координат юнита через Remote API в Wialon Pro

    function WialonApi(callback) {
        var self = this;
        self.session = undefined;
        this.serverUrl = 'http://server:8026/ajax.html?';
        this.request = function(method, params, callback) {
            var url = 'svc='+method+'&params={';
            jQuery.each(params, function(k, v) {
                url+= '"'+k+'":'+v+',';
            });
            url = url.slice(0, -1)+'}';
            if (self.session) {
                url = 'ssid='+self.session+'&' + url;
            }
            url = self.serverUrl + url;
            jQuery.post(url, {}, function(data) {
                if (callback) {
                    callback(data);
                }
            }, 'json');
        };
        self.request('core/login', {user:'"wialon"', password:'"*******"'}, function(data) {
            self.session = data.ssid;
            console.log('Wialon login', data);
            if (callback) {
                callback(data);
            }
        });
    }
    WialonApi.prototype = {
        getLocations: function(params, callback) {
            this.request('gis/get_locations', params, callback);
        },
        getAccountData: function(params, callback) {
            this.request('core/get_account_data', params, callback);
        }
    }

 var wialonApi = new WialonApi(function(){
      wialonApi.getAccountData({type:2}, function(data) {
            console.log('wialonApi.getAccountData', data);
      });    
 });

Wialon login > Object {uid: 383, eid: 56, ssid: "9f2720e1baaf2d0a71cbcc1002001d0c", pi: 2, tm: 1383054658…}
WialonApi.getAccountData Object {error: 4}