Angularjs - form undefined

I'm creating a simple app using angularjs and ionicframework and I created a simple login page.

This page has a simple form:

• CodiceCliente --> text input
• Password --> password input

and I need that the form is the first thing shown to the user when he arrives to that page, after he compiled the form I need to hide it and show a logout button.

This is my html code, as you can see I used ng-if="haveHash == true" to check if user compiled the form:

<div class="container" ng-if="haveHash == false">               

<form class="form-horizontal" ng-init="setFormScope(this)">

    <fieldset>

        <legend>Dati di login</legend>

       <div class="form-group">

           <label class=" col-lg-2 control-label">Codice cliente</label>
            <div class="col-lg-10">
                <div class="input-group">
                    <div class="form-control-wrapper">
                        <input ng-model="myForm.codice" type="text" placeholder="Codice Cliente" class="form-control empty" value="{{codicecliente}}">
                        <span class="material-input"></span>
                    </div>
                    <span class="input-group-btn">
                        <button class="btn btn-default btn-raised withripple" ng-click="scanBarcode()">Scan</button> 
                    </span>
                </div>
            </div>

        </div>

        <div class="form-group">

            <label class="col-lg-2 control-label" for="inputPassword">Password</label>
            <div class="col-lg-10">
                <div class="form-control-wrapper">
                    <input ng-model="myForm.password" type="password" placeholder="Password" id="inputPassword" class="form-control empty">
                    <span class="material-input"></span>
                </div>  
            </div>

        </div>                                    


        <div class="form-group">
            <div class="col-lg-10 col-lg-offset-2">
                <button class="btn btn-primary" type="submit" ng-click="generaHash()">Salva</button>
            </div>
        </div>

    </fieldset>

</form>
</div>

<div ng-if="haveHash == true">
    <a href="#" ng-click="disconnetti()">disconnetti</a>
</div>      

And this is my app.js

myApp.controller("ImpostazioniController", function($scope, $cordovaBarcodeScanner, $ionicPopup) {

    $scope.haveHash = false;

    $scope.setFormScope= function(scope){
        this.formScope = scope;
    }

    $scope.scanBarcode = function() {
        $cordovaBarcodeScanner.scan().then(function(imageData) {

            $scope.codicecliente = imageData.text;

//            alert(imageData.text);
//            console.log("Barcode Format -> " + imageData.format);
//            console.log("Cancelled -> " + imageData.cancelled);

        }, function(error) {
            console.log("An error happened -> " + error);
        });
    };

    $scope.disconnetti = function(){

        window.localStorage['auth_hash'] = "";
        window.localStorage['codicecliente'] = "";

        //Informo l'utente che ho salvato i dati 
        $ionicPopup.alert({
            title: 'Disconnessione',
            template: 'Logout effettuato correttamente.'
        });

        $scope.haveHash = false;

    };

    //Questa funzione viene richiamata quando si salva il form
    $scope.generaHash = function($localstorage){

        //Recupero codice e password
        var codice      = this.formScope.codice;
        var password    = this.formScope.password;

        //Elimino la cache precedente
        window.localStorage['auth_hash'] = "";
        window.localStorage['codicecliente'] = "";

        //Creo e salvo l'hash
        window.localStorage['auth_hash'] = btoa(codice+':'+password);
        window.localStorage['codicecliente'] = "codice";

        //console.log(window.localStorage['auth_hash']);

        //Informo l'utente che ho salvato i dati 
        $ionicPopup.alert({
            title: 'Login salvato',
            template: 'I tuoi dati sono stati salvati, ora puoi accedere alle tue cartelle cliniche.'
        });     

        //Svuoto il form
        $scope.myForm.codice    = '';
        $scope.myForm.password  = '';

        $scope.haveHash = false;

    };

});

This is the firebug error:

Error: $scope.myForm is undefined
$scope.generaHash@http://localhost:8100/js/app.js:117:3
Parser.prototype.functionCall/<@http://localhost:8100/lib/ionic/js/ionic.bundle.js:18471:1
@http://localhost:8100/lib/ionic/js/ionic.bundle.js:43026:30
$RootScopeProvider/this.$get</Scope.prototype.$eval@http://localhost:8100/lib/ionic/js/ionic.bundle.js:20326:9
$RootScopeProvider/this.$get</Scope.prototype.$apply@http://localhost:8100/lib/ionic/js/ionic.bundle.js:20424:11
@http://localhost:8100/lib/ionic/js/ionic.bundle.js:43025:7
m.event.dispatch@http://localhost:8100/js/jquery-1.11.1.min.js:3:8380
m.event.add/r.handle@http://localhost:8100/js/jquery-1.11.1.min.js:3:5115
triggerMouseEvent@http://localhost:8100/lib/ionic/js/ionic.bundle.js:2648:3
tapClick@http://localhost:8100/lib/ionic/js/ionic.bundle.js:2637:3
tapMouseUp@http://localhost:8100/lib/ionic/js/ionic.bundle.js:2707:5

http://localhost:8100/lib/ionic/js/ionic.bundle.js
Line 17696

Basically I want to show the form if there is no auth_hash saved in localStorage and the logout button if it is stored