curl --location --request POST 'http://127.0.0.1:3000/get_private_file_url' \
--header 'Content-Type: application/json' \
--data-raw '{
    "file_id": "string",
    "user_id": 0
}'{
    "status": "string",
    "retcode": 0,
    "data": {
        "url": "string"
    },
    "message": "string",
    "wording": "string"
}