venom/tpl/admin/base.php

<?php

use Venom\Models\User;
use \Venom\Security\Security;

if (!Security::get()->hasRole(User::ADMIN_ROLE)) {
    ?>
    <form method="post" action="/admin/api/login">
        <input type="text" name="USERNAME" placeholder="Username">
        <input type="password" name="PASSWORD" placeholder="Password">
        <input type="hidden" name="REDIRECT_TO" value="/admin/">
        <input type="submit" value="Login">
    </form>
    <?php
    echo 'Login!';
} else {
    echo 'Admin Interface!';
    echo '<a href="/admin/api/login/logout">Ausloggen</a>';
}