注入控制器时，服务未定义

我有一个控制器，我已经注入了一个工厂，但是当我调用该工厂的方法时，它返回为未定义。不知道我做错了什么。如有任何帮助，不胜感激。

(function(){
    'use strict';
    // Declare factory and add it 'HomeAutomation' namespace.
    angular.module('HomeAutomation').factory('AuthenticationService', ['$http','$localStorage', '$window', function($http, $localStorage, $window){
    var service = {};

    service.login = Login;
    service.logout = Logout;
    service.parseJWT = parseJWT;
    service.loginStatus = loginStatus;
    return service;

    function Login(email, password, callback){
        $http.post('api/user/login', {email: email, password: password})
            .success(function(res){
                // Login successful if there is a token in the response.
                if(res.token){
                    // store username and token in local storage to keep user logged in between page refreshes
                    $localStorage.currentUser = { email: email, token: res.token };
                    // add jwt token to auth header for all requests made by the $http service
                    $http.defaults.headers.common.Authorization = 'Bearer ' + res.token;
                    callback(true);
                }else{
                    callback(res);
                }
            }).error(function(err){
            console.log(err);
        });
    }
    function Logout(){
        $localStorage.currrntUser
    }
    function parseJWT(token){
        var base64URL, base64;
        base64URL = token.split('.')[1];
        base64 = base64URL.replace('-', '+').replace('_', '/');
        console.log(JSON.parse($window.atob(base64)));
    }
    function loginStatus(){
        if($localStorage.currentUser){
            return true;
        }else{
            return false;
        }
    }
}]);}());

控制器:

(function(){
angular.module('HomeAutomation')
    .controller('loginController', ['$scope', '$location', 'AuthenticationService', function($scope, $location, $localStorage, AuthenticationService){
        $scope.isLoggedIn = AuthenticationService.logout();
        $scope.logUserIn = function(){
            AuthenticationService.login($scope.login.email, $scope.login.password, function(result){
                if(result === true){
                    $location.path('/');
                }else{
                    console.log(result);
                }
            });
        };
        $scope.logUserOut = function(){
            AuthenticationService.logOut();
        }
    }]);}());

这是导致错误的行:

$scope.isLoggedIn = AuthenticationService.logout();

显然"AuthenticationService"没有定义。不知道为什么。