Scoring in a quiz app (how to increment scores in a quiz app)

i’m trying to add scores for a user in a quiz app, but i get an error “Uncaught TypeError: Cannot read property ‘profile’ of undefined” on the code “var correctAns = account.profile.score;”. i’m using the AccountsUser Package

Template.quiz.events({
    'click .next': function (evt,template) {
     //   countdown.start(function () {
            evt.preventDefault();
            Session.set("questionNumber", Session.get("questionNumber") + 1);
            var element = template.find('input:radio[name=k]:checked');
            // var inputValue = template.find('#myId').value;

             console.log($(element).val());
             var Id = this._id;
             var account = Meteor.users.findOne({_id: Id});
             var correctAns = account.profile.score;
                console.log(correctAns);
            if (element == correctAns) {
                Meteor.users.update({_id:Id}, {$inc:{'profile.score': 2}}, function(err){
                    if(err){
                        console.log(err);
                    } else {
                        console.log('updated')
                    }
                })
            }

my users database is as follows:

{
   "_id": "MNg6dJsWKyEETy5ej",
   "profile": {
   "firstname": "le",
   "lastname": "me",
  "phonenumber": "02929",
  "user": "Staff",
  "AccountStatus": "Activated",
  "score": 0
 },
 "username": "11"
 }

Finally Fixed it.

Template.quiz.events({
  'click .next': function (evt,template) {
 //   countdown.start(function () {
        evt.preventDefault();
        Session.set("questionNumber", Session.get("questionNumber") + 1);
        var element = template.find('input:radio[name=k]:checked');
        // var inputValue = template.find('#myId').value;

         console.log($(element).val());
         var Id = Meteor.userId();
         var trys = $(element).val();
          // console.log(Id);
         var question_ID = this._id;
         var account = Questions.findOne({_id: question_ID});
         var correctAns = account.correctAns;
            console.log(correctAns);
            console.log(trys);
        if (trys == correctAns) {
            Meteor.users.update({_id:Id}, {$inc: {'profile.score': 2}},  function(err){
            //  Meteor.users().update({_id: Meteor.userId()}, {$inc: {score: 2}}, function(err){
                if(err){
                    console.log(err);
                } else {
                    console.log('updated')
                }
            })
        }