AngularJS Login form with ng-click not working - angularjs

Question

I wrote a basic login form in this plunk http://plnkr.co/edit/xQEN1ZNN5ZEw1CSwNw97?p=preview (click on the red Log into Dashboard button on the Home route).
However for some reason I cannot get the login() method to fire in my loginCtrl controller code.
Why is this example working, and mine is not ? http://plnkr.co/edit/H4SVl6?p=preview
Instead what it's doing is an old-school URL redirect with the user/password parameters passed in as form variables. I can't figure out what's wrong.
Here is LoginCtrl code as well as the login-form.html template :
(function () {
'use strict';
angular.module('routerApp').controller('LoginCtrl',
['$rootScope', '$scope', authenticate]);
function authenticate($rootScope, $scope, userService) {
var login = this;
login.loginUser = function () {
login.dataLoading = true;
//loginService.authUser(login.user, login.password); // TO DO !!!
};
login.test = function () {
var test = true;
};
}
})();
<div ng-show="error" class="alert alert-danger">{{error}}</div>
<form ng-submit="login.loginUser()" name="form">
<div class="form-group">
<label for="username">Username</label>
<i class="fa fa-key"></i>
<input type="text" name="username" id="username" class="form-control" ng-model="login.username" required />
<span ng-show="form.username.$dirty && form.username.$error.required" class="help-block">Username is required</span>
</div>
<div class="form-group">
<label for="password">Password</label>
<i class="fa fa-lock"></i>
<input type="password" name="password" id="password" class="form-control" ng-model="login.password" required />
<span ng-show="form.password.$dirty && form.password.$error.required" class="help-block">Password is required</span>
</div>
<div class="form-actions">
<button type="submit" ng-disabled="form.$invalid || dataLoading" class="btn btn-danger">Login</button>
<img ng-if="login.dataLoading" src="data:image/gif;base64,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"/>
</div>
</form>
In my local app, it is posting the old-style form variables via the URL, and I cannot get it to fire the login.loginUser function below inside LoginCtrl.
thnk you in advance...
Bob

Answer 1

for some odd reason (perhaps ui-router versioning) the controllerAs is not working.
Diana´s answer is valid, but it doesn´t use the controlleras syntax.
If you still want to use it, change the ui-router setting to:
.state('login', {
url: "/login",
templateUrl: "login-form.html",
controller: 'LoginCtrl as login',
})
That should do the trick ;)
Check it out:
http://plnkr.co/edit/OCqNexVeFFxt4kUuEVc1?p=preview

Answer 2

The controller change I applied is:
angular.module('routerApp').controller('LoginCtrl', function ($rootScope, $scope) {
$scope.loginUser = function () {
$scope.dataLoading = true;
//loginService.authUser(login.user, login.password); // TO DO !!!
};
$scope.test = function () {
var test = true;
};
})
and in the template I removed login. from the ng-if and ng-submit.
Here is a working plunks.