userCreatedSuccess not updated

gistfile1.js

<div class="alert alert-error"> {{userCreatedSuccess}}</div>




$scope.createAccount = function(_email, _password) {
          $http({
              url: 'http://localhost:8000/api/newuser/',
              method: 'POST',
              data: JSON.stringify({first_name: "", last_name: "", email: _email, password: _password}),
              headers: {'Content-Type': 'application/json'},
               }).
              success(function(data, status) { $scope.userCreatedSuccess = "trolololol";}).
              error(function(data, status) { console.log(data + "trololol " + status);}) 
      }