AngularJS Authentication service

authService.js

(function() {
    'use strict';

    app.factory('authService', authService);

    authService.$inject = ['localStorageService'];

    var authentication = {
        isAuth: false,
        customerId: 0
    };

    function authService(localStorageService) {
        function authenticate(userId, token) {
            localStorageService.set('authorizationData', { token: token, userName: userId });

            authentication.isAuth = true;
            authentication.customerId = customerId;
        }

        function fillAuthData() {
            var authData = localStorageService.get('authorizationData');
            if (authData) {
                authentication.isAuth = true;
                authentication.customerId = authData.customerId;
            };
        }

        var service = {
            authenticate: authenticate,
            fillAuthData: fillAuthData,
            authentication: authentication
        };

        return service;
    }
})();