Add means to prevent registration on the testing site.

src/Controllers/AuthController.php

@@ -84,14 +84,19 @@ class AuthController extends Controller
     public function register()
     {
         $app = Application::getInstance();
+        $prevent_registration = $app->config->get('Auth', 'prevent_registration', 'bool', false);
 
         if ($app->getSession() !== null) {
             return '<meta http-equiv="refresh" content="0; url=/">';
         }
 
         if ($_SERVER['REQUEST_METHOD'] === 'GET') {
-            $twig = $app->templating;
-            return $twig->render('auth.register');
+            $app->templating->var('prevent_registration', $prevent_registration);
+            return $app->templating->render('auth.register');
+        }
+
+        if ($prevent_registration) {
+            return ['error' => 'Registration is not allowed on this instance.'];
         }
 
         if (!isset($_POST['username'], $_POST['password'], $_POST['email'])) {

views/nova/auth/register.twig

@@ -4,11 +4,16 @@
 
 {% block banner_content %}
     <h1 style="align-self: center; text-align: left; flex-grow: 1; padding-left: 2em">
+        {% if not prevent_registration %}
             Welcome, thanks for dropping by!
+        {% else %}
+            Stop!
+        {% endif %}
     </h1>
 {% endblock %}
 
 {% block content %}
+    {% if not prevent_registration %}
         <div class="platform form" id="auth-form">
             <div>
                 <input class="form__text" type="text" name="username" placeholder="Username">
@@ -24,4 +29,9 @@
             </div>
         </div>
         {{ parent() }}
+    {% else %}
+        <div class="platform">
+            <p>You're currently using the site via the public testing end, if you want to create an account please do so from the main website.</p>
+        </div>
+    {% endif %}
 {% endblock %}