feat: token authentication (#3927)

templates/token.html.php

@@ -0,0 +1,20 @@
+<?php
+/**
+ * This template renders a form for user to enter a auth token if it's enabled
+ */
+
+?>
+
+<h1>
+    Authentication with token required
+</h1>
+
+<p>
+    <?= e($message) ?>
+</p>
+
+<form action="" method="get">
+    <label for="token">Token:</label>
+    <input type="password" name="token" id="token" placeholder="token">
+    <input type="submit" value="OK">
+</form>