AngularJS $rootScope.$broadcast not working in app.run

You are always going to have a race condition. I have a couple alternatives you can do:

1) Use a service. I am not really a fan of this option because it leads to Spaghetti code. And most time you don't want the controller to run until you have logged on. I prefer option 2.

 myApp.run(['AuthDataSvc', '$rootScope', function (AuthDataSvc, $rootScope) {    
    AuthDataSvc.getAuth(); /* no op we will use the service to determine logged in */
}]);


/* inside a controller */
if(AuthDataSvc.isLoggedIn()){
      //do something.
}

2) Use a route.resolve. Resolves are defined on the route and the Controller will only load once it the promise has been set to resolved. I showed you an example for ui-router and ng-route you need to pick your poison. If you dont use ui-router you should consider it.

/* app.config ... route config.. */
var waitForLogon = {
      UserToken: ["AuthDataSvc", function (AuthDataSvc) {
         return AuthDataSvc.logon();
      }]
};

//this is for ng-route
 $routeProvider
   .when('/Book/:bookId', {
      templateUrl: '--',
      controller: 'MyCtrl',
      resolve: waitForLogon
   })


//this is for ui-router 
$stateProvider
     .state('me', {
            templateUrl: '--',
            controller: 'MeCtrl',
            resolve: waitForLogon
 })

/* controller */
 angular.module('yourapp')
    .controller('MyCtrl', ["UserToken", ... , function(UserToken){
                  //User Token will always be here when your Ctrl loads.
   });

/* service code -- */
angular.module('yourapp')
    .service('AuthDataSvc', ["LogonModel", "$q", function(LogonModel, $q) {
        this._q = null;
        var that = this;
        this._doAuth = function(){
           this.getAuth().then(function(Token){ that._q.resolve(Token) }, function(error){that._q.reject(error);}
        };
        this.logon = function () {
            if(!this._q){
              this._q = $q.defer();
               this._doAuth();// <-current auth do here, and resolve this._q when done
            }
            return this._q.promise;
        };
    });