how to call remember me in ionic?

Hi i am creating an app using ionic side-menu in that i need to remember the logged in user for that i am saving the username and password like this.

window.localStorage['rem'] = 'yes';
window.localStorage['Username'] = $scope.loginData.username;
window.localStorage['password'] =$scope.loginData.password;

The saving function is working fine, problem is i tried to read the saved data while starting the app controller is not calling.How can i call the controller while loading the login page in ionic side menu app?

Thanks in advance

To save the data in local storage 

window.localstorage.setItem ("username",$scope.loginData.username);
window.localStorage.setItem("password", $scope.loginData.password);

To retrieve data use

window.localstorage.getItem("username");
window.localstorage.getItem("password");

Now create a deviceready event listener inside $ionicPlatform.ready function.

check the sample code 



$ionicPlatform.ready(function() {                
            document.addEventListener("deviceready", function()
                                           {
                                            if(window.localstorage.getItem("username")! == null && window.localstorage.getItem("password")! == null){
                                             state.go("afterLogin.html");
                                            }
                                            else
                                                 state.go("login.html");

                                            }, false);
                                 }

Try this: 

angular.module('ionic.utils', [])

.factory('$localstorage', ['$window', function($window) {
  return {
    set: function(key, value) {
      $window.localStorage[key] = value;
    },
    get: function(key, defaultValue) {
      return $window.localStorage[key] || defaultValue;
    },
    setObject: function(key, value) {
      $window.localStorage[key] = JSON.stringify(value);
    },
    getObject: function(key) {
      return JSON.parse($window.localStorage[key] || '{}');
    }
  }
}]);