Add auth test suite, API tests and database migration tests

app/Controllers/Auth.php

@@ -0,0 +1,62 @@
+<?php
+
+namespace App\Controllers;
+
+use App\Models\UserModel;
+use CodeIgniter\HTTP\ResponseInterface;
+
+class Auth extends BaseController
+{
+    public function login()
+    {
+        return view('auth/login_register');
+    }
+
+    public function attemptLogin()
+    {
+        $email = $this->request->getPost('email');
+        $password = $this->request->getPost('password');
+
+        $userModel = new UserModel();
+        $user = $userModel->where('email', $email)->first();
+
+        if ($user && password_verify($password, $user['password_hash'])) {
+            // Login successful
+            session()->set('user_id', $user['id']);
+            session()->set('user_email', $user['email']);
+            return redirect()->to('/dashboard'); // or wherever
+        } else {
+            return redirect()->back()->with('error', 'Invalid credentials');
+        }
+    }
+
+    public function attemptRegister()
+    {
+        $email = $this->request->getPost('email');
+        $password = $this->request->getPost('password');
+        $name = $this->request->getPost('name');
+
+        $userModel = new UserModel();
+        $data = [
+            'email' => $email,
+            'password_hash' => password_hash($password, PASSWORD_DEFAULT),
+            'name' => $name,
+        ];
+
+        if ($userModel->insert($data)) {
+            // Registration successful, auto login
+            $user = $userModel->where('email', $email)->first();
+            session()->set('user_id', $user['id']);
+            session()->set('user_email', $user['email']);
+            return redirect()->to('/dashboard');
+        } else {
+            return redirect()->back()->with('error', $userModel->errors());
+        }
+    }
+
+    public function logout()
+    {
+        session()->destroy();
+        return redirect()->to('/auth/login');
+    }
+}