I've made a login form and now I need to have the same code in one of my **Cakephp** project but it doesn't work..

```
<!-- LOGIN SECTION START -->
    <section id="login">
        <div class="container">
            <div class="row">
                <div class="Absolute-Center is-Responsive">
                    <h1 class="text-center form-login-title">Log In</h1>    
                    <div class="col-sm-12 col-md-12 col-md-offset-0">   

                        <?php echo $this->Session->flash('auth'); ?>
                        <?php echo $this->Form->create('User');?>

                            <div class="form-group inner-icon right-icon"> <!--USER NAME-->
                                <i class="glyphicon glyphicon-user"></i>

                                <input class="form-control" type="text" name='username' placeholder="username"/>

                            </div>
                            <div class="form-group inner-icon right-icon"> <!--PASSWORD-->
                                <i class="glyphicon glyphicon-lock"></i>

                                <input class="form-control" type="password" name='password' placeholder="password"/>

                            </div>

                            <?= $this->Form->end(__('Sign In')); ?> <!-- SUBMIT BUTTON -->

                            <div class="form-group text-center">
                                <a href="#">Forgot Password</a>
                            </div>
                    </div><!-- /.col-sm-12 -->
                </div>    
            </div><!-- /.row -->
        </div><!-- /.container -->
    </section>
<!-- LOGIN SECTION END -->

```

So with that snippet does not let me log in (the back end is not the problem)

Oh, and how can I change the submit button style ? I've tried `<?= $this->Form->end(__(Sign In), array('class'=>'btn-primary')); ?>`
but it doesn't help much :(

Thanks