# Account Management APIs

- `POST /register`: Register a new user account.
  - body:
    - `username`: The desired username for the account.
    - `email`: The email address associated with the account.
    - `password`: The desired password for the account.
  - response:
    - `201 Created`: Account successfully created.
    - `400 Bad Request`: Invalid input data (e.g., password not complex enough, username already exists).
    - `409 Conflict`: Account already exists.
    - `500 Internal Server Error`: Server error during account creation.
- `POST /login`: Authenticate a user and obtain an access token.
  - body:
    - `username`: The username of the account.
    - `password`: The password of the account.
  - response:
    - `200 OK - cookie`: Authentication successful, saves an access token linked to a cookie.
    - `409 Forbidden`: Invalid username or password.
    - `500 Internal Server Error`: Server error during authentication.
- `POST /logout`: Invalidate the user's access token.
  - Cookie:
    - `token`: The access token linked to the cookie.
  - response:
    - `200 OK`: Logout successful.
    - `401 Unauthorized`: Invalid or expired token.
- `GET /me`: Retrieve the current user's account information.
  - Cookie:
    - `token`: The access token linked to the cookie.
  - response:
    - `200 OK`: Returns the user's account information.
    - `401 Unauthorized`: Invalid or expired token.