Automated AI Code Pull Request Review

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        "pr_body": "This pull request introduces user authentication using JSON Web Tokens (JWT). It includes:\n\n- User registration endpoint (`/api/auth/register`)\n- User login endpoint (`/api/auth/login`)\n- JWT generation and validation middleware\n- Password hashing using bcrypt\n\n**Changes:**\n- Added `auth` module in `src/modules`\n- Updated `package.json` with new dependencies (`jsonwebtoken`, `bcryptjs`)\n- Added unit tests for authentication endpoints\n\n**Testing:**\n- Tested registration and login flows locally.\n- Verified JWT generation and expiration.\n\n**Potential concerns:**\n- Rate limiting for login attempts should be considered in a production environment.",
        "pr_title": "feat: Implement user authentication with JWT",
        "diff_summary": "Added 3 new files, modified 5 files. Key changes include the creation of `src/modules/auth/auth.controller.ts`, `src/modules/auth/auth.service.ts`, and `src/middleware/jwt.middleware.ts`. The `package.json` file has been updated to include `jsonwebtoken` and `bcryptjs`. Unit tests for the new authentication endpoints have been added in `tests/auth.spec.ts`."
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