diff --git a/forum/auth.js b/forum/auth.js
new file mode 100644
index 0000000..63c33c6
--- /dev/null
+++ b/forum/auth.js
@@ -0,0 +1,20 @@
+document.getElementById("auth-form").addEventListener("submit", function (event) {
+    event.preventDefault();
+
+    const username = document.getElementById("username").value;
+    const password = document.getElementById("password").value;
+
+    const turnstileResponse = document.querySelector(".cf-turnstile-response").value;
+    if (!turnstileResponse) {
+        alert("Please complete the CAPTCHA");
+        return;
+    }
+
+    // Simulate authentication (In a real application, verify credentials and CAPTCHA on the server)
+    if (username && password) {
+        localStorage.setItem("username", username);
+        window.location.href = "index.html";
+    } else {
+        alert("Invalid login credentials");
+    }
+});