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QUICK_AUTH_GUIDE.md

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+# 🚀 Quick Authentication Guide
+
+## 1️⃣ Start Backend
+```bash
+cd your-backend
+npm run start:dev
+```
+
+## 2️⃣ Run App
+```bash
+flutter run
+```
+
+## 3️⃣ Login
+```dart
+// In your widget
+final success = await ref.read(authProvider.notifier).login(
+  email: 'user@example.com',
+  password: 'Password123!',
+);
+```
+
+## 4️⃣ Check Auth Status
+```dart
+final isAuth = ref.watch(isAuthenticatedProvider);
+final user = ref.watch(currentUserProvider);
+```
+
+## 5️⃣ Use API (Auto-Authenticated!)
+```dart
+// Token automatically included in headers
+final products = await getProducts();
+final categories = await getCategories();
+```
+
+## 6️⃣ Logout
+```dart
+await ref.read(authProvider.notifier).logout();
+```
+
+---
+
+## 🔑 Key Endpoints
+
+| Endpoint | Auth Required | Description |
+|----------|---------------|-------------|
+| `POST /api/auth/login` | ❌ No | Login user |
+| `POST /api/auth/register` | ❌ No | Register user |
+| `GET /api/auth/profile` | ✅ Yes | Get profile |
+| `GET /api/products` | ❌ No | Get products |
+| `GET /api/categories` | ❌ No | Get categories |
+
+---
+
+## 📍 Important Files
+
+- **Login Page:** `lib/features/auth/presentation/pages/login_page.dart`
+- **Auth Provider:** `lib/features/auth/presentation/providers/auth_provider.dart`
+- **API Config:** `lib/core/constants/api_constants.dart`
+- **Full Docs:** `AUTH_READY.md`
+
+---
+
+## ⚡ Bearer Token Flow
+
+```
+Login → Token Saved → Token Set in Dio → All API Calls Auto-Authenticated
+```
+
+**You never need to manually add tokens!** 🎉
+
+---
+
+## 🎯 Test Credentials
+
+Create in your backend:
+```json
+{
+  "email": "test@retailpos.com",
+  "password": "Test123!",
+  "name": "Test User"
+}
+```
+
+---
+
+## ✅ Status
+
+- Errors: **0**
+- Build: **SUCCESS**
+- Auth: **READY**
+- Documentation: **COMPLETE**
+
+**Just run `flutter run` and start using!** 🚀