How to redirect users with unverified emails using Angular UI-Router?

I am using AngularJS with Meteor and wanted to redirect users with unverified emails to the sign in page. I have created a sign in view in /client/routes.js:

app.config(['$stateProvider', '$urlRouterProvider',
function($stateProvider, $urlRouterProvider){
  $urlRouterProvider.otherwise('/');

  $stateProvider

  .state('signin', {
    url:'/signin',
    views: {
      main: {
        templateUrl: 'client/views/profile/signin.tpl'
      }
    }
  })

Note that there are other states I am not listing for brevity sake.

Now, I want to redirect users to this sign in page if their emails have not been verified. How do I modify the example below from UI-Router FAQs to meet my needs? Other solutions not using the example below are acceptable to me as long as they address the issue at hand.

Example: Uses the data object on the state config to define a rule function that will run logic against the user (here using an example service called $currentUser). The $stateChangeStart handler catches all state transition and performs this rule check before allowing the transition, potentially blocking it and/or redirecting to a different state.

app.config(function($stateProvider) {
  $stateProvider.state('privatePage', {
    data: {
      rule: function(user) {
        // ...
      }
  });
});
app.run(function($rootScope, $state, $currentUser) {
  $rootScope.$on('$stateChangeStart', function(e, to) {
    if (!angular.isFunction(to.data.rule)) return;
    var result = to.data.rule($currentUser);

    if (result && result.to) {
      e.preventDefault();
      // Optionally set option.notify to false if you don't want 
      // to retrigger another $stateChangeStart event
      $state.go(result.to, result.params, {notify: false});
    }
  });
});