In this section, you will create AWS Lambda functions and expose them via Amazon API Gateway to build the serverless backend for DaiVietBlood.

| Method | Endpoint | Description |
|---|---|---|
| GET | /users | Get all users |
| POST | /users | Create new user |
| GET | /users/{id} | Get user by ID |
| GET | /donations | Get all donations |
| POST | /donations | Create donation appointment |
| GET | /emergency-requests | Get emergency requests |
| POST | /emergency-requests | Create emergency request |