{
    "common.success": {
        "code": 0,
        "message": "success"
    },
    "common.invalid_request": {
        "code": 100001,
        "message": "Invalid request"
    },
    "user.not_found": {
        "code": 100002,
        "message": "User not found"
    },
    "system.internal_error": {
        "code": 100003,
        "message": "Internal server error"
    }
}