/achievers-learning-platform
├── config/
│   ├── database.php        # Database PDO connection
│   └── paystack.php        # Paystack secret & public keys
├── api/
│   ├── auth/
│   │   ├── register.php    # User registration endpoint
│   │   └── login.php       # User login endpoint
│   ├── courses/
│   │   ├── list.php        # Fetch courses (filtered by category/status)
│   │   ├── create.php      # [Super Admin] Create/Edit course
│   │   └── details.php     # Fetch modules, lessons, live status
│   ├── payments/
│   │   ├── initialize.php  # Initialize Paystack transaction
│   │   └── verify.php      # Verify Paystack transaction webhook/callback
│   ├── progress/
│   │   └── complete_lesson.php
│   └── certificates/
│       └── generate.php    # Generate dynamic completion certificate
├── middleware/
│   └── auth_middleware.php # Token/Session verification & Role check
└── helpers/
    └── response.php        # Standard JSON API response handler