fixes

getUsers.php

@@ -1 +1,21 @@
-{"error":"Unauthorized"}
+<?php
+session_start();
+header('Content-Type: application/json');
+if (!isset($_SESSION['authenticated']) || $_SESSION['authenticated'] !== true ||
+    !isset($_SESSION['isAdmin']) || $_SESSION['isAdmin'] !== true) {
+    echo json_encode(["error" => "Unauthorized"]);
+    exit;
+}
+$usersFile = 'users.txt';
+$users = [];
+if (file_exists($usersFile)) {
+    $lines = file($usersFile, FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);
+    foreach ($lines as $line) {
+        $parts = explode(':', trim($line));
+        if (count($parts) >= 3) {
+            $users[] = ["username" => $parts[0]];
+        }
+    }
+}
+echo json_encode($users);
+?>