title: $rootScope.currentUser is null on refresh
body: <p>I was able to get the firebaseSimpleLogin working and storing the current user in the rootScope. When I goto another page and come back to the feed page everything loads, but when I refresh $rootScope.currentUser is null. Has anyone else had this issue?</p>
  
  <p>I have this piece of code in my app.run function:</p>
  
  <pre><code>$rootScope.$on('$firebaseSimpleLogin:login',function(e, auth){
     $rootScope.currentUser = User.find(auth.id);
  });
  </code></pre>
  
  <p>And this is my FeedCtrl that is trying to load in the user's posts</p>
  
  <pre><code>app.controller('FeedCtrl',['$scope', '$rootScope','User','Auth','Post',function($scope,     $rootScope,User,Auth,Post){
   populateFeed();
   console.log($rootScope.currentUser);
  
  $scope.logout = function(){
     Auth.logout();
  };
  
  
  $scope.savePost = function(){
    Post.create($scope.post).then(function(post){
      $scope.post.text = "";
    });
  };
  
  function populateFeed(){
     $scope.posts = {};
     angular.forEach($rootScope.currentUser.posts,function(id){
      $scope.posts[id] = Post.find(id);
     });
  }
  
  }]);
  </code></pre>
  
  <p>My Main app Module</p>
  
  <pre><code>var app = angular.module('myapp',['ui.router','firebase']);
  
  app.config(function($stateProvider, $urlRouterProvider){
    $stateProvider
  .state('/',{
    url: '/',
    controller: 'MainCtrl',
    templateUrl: 'views/index.html'
  })
  .state('feed',{
    url: '/feed',
    controller: 'FeedCtrl',
    templateUrl: 'views/feed.html',
    authenticate: true
  })
  .state('login',{
    url: '/login',
    controller: 'LoginCtrl',
    templateUrl: 'views/login.html'
  })
  .state('signup',{
    url: '/signup',
    controller: 'LoginCtrl',
    templateUrl: 'views/signup.html'
  })
  .state('settings',{
    url: '/settings',
    controller: 'SettingsCtrl',
    templateUrl:"views/settings.html"
  })
  .state('profile',{
    url: '/:slug',
    controller: 'ProfileCtrl',
    templateUrl: 'views/profile.html'
  })
  .state('profile-about',{
    url: '/:slug/about',
    controller: 'ProfileCtrl',
    templateUrl: 'views/profile.html'
  });
  
  $urlRouterProvider.otherwise('/');
  })
  .constant('FIREBASE_URL','https://{FIREBASE}.firebaseio.com/')
  .run(function($rootScope, $state,FIREBASE_URL, $firebaseSimpleLogin, User, Auth){
  $rootScope.$on('$stateChangeStart',function(event, next){
    if(next.authenticate &amp;&amp; !User.getCurrentUser()){
       $state.go('login');
    }
   });
  
   $rootScope.$on('$firebaseSimpleLogin:login',function(e, auth){
     $rootScope.currentUser = User.find(auth.id);
    });
  
   $rootScope.$on('$firebaseSimpleLogin:logout',function(){
    delete $rootScope.currentUser;
    $state.go('login');
   });
  
   $rootScope.logout = function(){
    Auth.logout();
  };
  
  });
  </code></pre>