Untitled

$builder
->add('username', TextType::class , array(
    'label'  => false,
    'attr'   =>  array(
        'ng-model' => 'formData.username',
        'id' => 'usernamesignup',
        'placeholder' => 'myusername690',
        'required' => false)
    ))
->add('email', TextType::class , array(
    'label'  => false,
    'attr'   =>  array(
        'ng-model' => 'formData.email',
        'id' => 'emailsignup',
        'placeholder' => 'mymail@mail.com',
        'ng-pattern' => '/^([0-9a-zA-Z]([-.w]*[0-9a-zA-Z])*@([0-9a-zA-Z][-w]*[0-9a-zA-Z].)+[a-zA-Z]{2,9})$/',
        'required' => false)
    ))
->add('plainPassword', RepeatedType::class, array(
    'type' => PasswordType::class,
    'first_options'  => array(
        'label' => false,
        'attr'   =>  array(
            'ng-model' => 'formData.password',
            'id' => 'passwordsignup',
            'placeholder' => 'eg. X8df!90EO',
            'required' => false)
        ),
    'second_options' => array('label' => false,
    'attr'   =>  array(
            'ng-model' => 'formData.confirm_password',
            'id' => 'passwordsignup_confirm',
            'placeholder' => 'eg. X8df!90EO',
            'required' => false)
        ),
    )
);

<body ng-app="LoginApp">
    <div id="register" class="animate form" ng-controller="RegisterController as registerCtrl">
            {{ form_start(form, {'attr': {'name':'registerFrm', 'id':'registerFrmId', 'novalidate': '', 'ng-submit':'registerCtrl.registerFrm()'}}) }}
                Your username
                {{ form_row(form.username) }}
                <span class="error" ng-show="submitted && registerFrm.adminuser[username].$error.required">Username is required!</span>

                Your email
                {{ form_row(form.email) }}
                <span class="error" ng-show="submitted && registerFrm.adminuser[email].$invalid">Invalid email</span>

                Your password
                {{ form_row(form.plainPassword.first) }}
                <span class="error" ng-show="submitted && registerFrm.adminuser[plainPassword][first].$error.required">Password is required!</span>

                Please confirm your password
                {{ form_row(form.plainPassword.second) }}
                <span class="error" ng-show="submitted && registerFrm.adminuser[plainPassword][second].$error.required">Password is required!</span>

                <p class="signin button">
                    <input type="submit" name="signup" ng-model="signup" ng-click="submitted=true" value="Sign up" />
                </p>
            {{ form_end(form) }}
        </div>

            <script>
                var App = angular.module('LoginApp',[]);

                App.controller('RegisterController', ['$scope','$http',function($scope,$http) {
                //$scope.formData   = {};
                this.registerFrm = function() {
                    var encodedString   = $.param($scope.formData);

                    console.log(encodedString);
                    $http({
                        method: 'POST',
                        url: 'login',
                        data: encodedString,
                        headers: {'Content-Type': 'application/x-www-form-urlencoded'}
                    })
                    .success(function(data, status, headers, config) {
                        console.log(data);
                    })
                    .error(function(data, status, headers, config) {
                        $scope.errorMsg = 'Unable to submit form';
                    })
                }
            }]);
            </script>
        </body>

adminuser[username]=tecnily&adminuser[email]=krebinj%40gmail.com&adminuser[password]=654321&adminuser[confirm_password]=654321&adminuser[signup]=signup

$user = new User();
echo '<pre>';print_r($user);exit;

<pre>AppBundleEntityUser Object
(
    [username:AppBundleEntityUser:private] =>
    [email:AppBundleEntityUser:private] =>
    [password:AppBundleEntityUser:private] =>
    [plainPassword:AppBundleEntityUser:private] =>
    [createDate:AppBundleEntityUser:private] =>
    [id:AppBundleEntityUser:private] =>
)