I am trying to reuse Member Group Picker of umbraco.

but when I submit form i get $scope.myMemberGroupPicker is undefined.

myview.html

<div ng-controller="myContentController">

<umb-control-group class="umb-membergrouppicker" label="Member Group">
            <umb-editor model="myMemberGroupPicker" prevent-default=""></umb-editor>
    </umb-control-group>

</div>

myview.controller.js

function myContentController($scope, $routeParams, angularHelper) {

$scope.myMemberGroupPicker = { view: 'memberGroupPicker', value: $scope.model.question.memberGroup, config: $.extend({}, $scope.config.memberGroupPicker) };

$scope.$watch('myMemberGroupPicker', function (scope) {
        if ($scope.myMemberGroupPicker != undefined) {
            $scope.model.question.memberGroup = $scope.myMemberGroupPicker.value;
        }
    }, true);


$scope.save = function () {
    var group = $scope.myMemberGroupPicker.value; //undefined
}

}

angular.module("umbraco").controller("myContentController", myContentController);