Toggle User

HTML

<div ng-app="app" ng-controller="Controller">
  {{user}}
  <button ng-click="changeUser()">Toggle User</button>
  <div ng-if="user.key">{{user.name}}</div>
</div>

JavaScript

angular
  .module('app', [])
  .controller('Controller', Controller);


function Controller($scope) {
  $scope.user = {
    key: 'j16er48',
    name: 'Foo',
    title: 'Bar'
  };

  $scope.changeUser = function() {
    if ($scope.user.key) {
      $scope.user = {
        key: false,
        name: 'Foo',
        title: 'Bar'
      };
    } else {
      $scope.user = {
        key: 'j16er48',
        name: 'Foo',
        title: 'Bar'
      };
    }
  }
}