authenticationSession does not populate user to session.secure ember-simple-auth testing

"ember-cli-simple-auth-testing": "0.8.0", Hi I have a protected route under which all routes that needs authentication is nested.

On authentication I populate current user to get extra information of current user like rights.

  _populateCurrentUser(){
    var self = this;
    const user_id = this.get('session.secure.user.id');
    const user_type = userType(parseInt(self.get('session.secure.user.type')));
    return self.store.find(user_type,user_id).then(function(user){
        self.set('session.currentUser',user);
      if(Ember.isEmpty(user)){
        self.transitionTo('login');
      }
    },function(err){
        console.log("There was some error getting currentUser"+err);
    });
  }

I call the above _populateCurrentUser() in before model of protected route.

beforeModel(transition,queryParams) {
        var self = this;
        self._super(transition,queryParams);
    if (self.session.isAuthenticated) {
       return this._populateCurrentUser();
    }
  },

for testing purpose I need to populate the session.secure.user.id

test('I can create a story',function(assert){
  var user =  server.create('writer');
  var sessionWriter = {
    secure: {
      user:{
        id: 1,
        type: 'writer'
      }
    }
  };
  authenticateSession(this.application,sessionWriter);

The above authenticateSession does not add the session sessionWriter and hence my _populateCurrentUser() fails as self.get('session.secure.user.... is empty.