我想創建一個 Express API 并使用express-validator. 目前這是我的驗證中間件protected validate = async (request: Request, response: Response, next: NextFunction): Promise<void> => {    const validationErrors: Result<ValidationError> = validationResult(request);    if (!validationErrors.isEmpty()) {        response.status(422).json({ errors: validationErrors.array() });    } else {        next();    }};我的基本驗證設置看起來像public persist = [    body('username')        .isString()        .withMessage('username must be of type string.')        .isLength({ min: 1 })        .withMessage('username must be at least one character long.')        .exists()        .withMessage('username is required.'),    body('password')        .isString()        .withMessage('password must be of type string.')        .isLength({ min: 1 })        .withMessage('password must be at least one character long.')        .exists()        .withMessage('password is required.'),    this.validate,];當我調用POST /users以創建新用戶時，我會收到有關無效輸入的詳細錯誤響應。當我刪除所有自定義錯誤消息時，我收到此響應[    {        "msg": "Invalid value",        "param": "username",        "location": "body"    },    {        "msg": "Invalid value",        "param": "password",        "location": "body"    }]有沒有辦法獲得自動生成的錯誤消息，還是我真的必須自己編寫這些錯誤消息？