how to receive files using nodejs express

im trying to make my own api and one part of it is that I want it to be able to receive text and files from a discord webhook, the text part works fine but when I send the file I can't seem to figure out how to receive it. I looked around for a bit and saw that req.files will return the file but I just get undefined. Here is my api code:

const express = require('express'),
bodyParser = require('body-parser'),
base32 = require('base32'),

const pass = "5'g5?cDzy}\\p5zAwvT[DJ/SeD"
const port = 8080

function denied(res) {
    res.status(403);
    res.send('no');
}

const api = express();
api.use(bodyParser.json());
api.listen(port, () => { console.log(`api running on port ${port}`) });

api.post('/webhook', (req, res) => {
    if (!req.headers) {
        denied(res);
    }
    var auth = req.headers['authorization'];
    if (auth && base32.decode(auth) === pass) {
        console.log(req.files) //undefined
        res.send('done');
    } else {
        denied(res);
    }
});

and this is the code I use to send the file and text:

import requests

key = '6mkped9zcd27mybxbhr3ayj1exv58pu498qn6ta4'

header = {
       "Content-Type": "application/json",
       "User-Agent": "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.11 (KHTML, like Gecko) Chrome/23.0.1271.64 Safari/537.11",
       'Authorization': key
    }

info = {
        "avatar_url":"https://cdn.discordapp.com/attachments/901070985434918965/904813984753000469/nedladdning_14.jpg",
        "name":"test",
        "embeds": [...]
        }

r = requests.post('http://localhost:8080/webhook', headers=header, json=info)
r2 = requests.post('http://localhost:8080/webhook', headers={'Authorization': key}, files={'file': open('test.zip','rb')})
print(r.text, r.status_code)
print(r2.text, r2.status_code)