zoom.js

const express = require('express');
const app = express();
const axios = require('axios');

const ZOOM_CLIENT_ID = 'my_client_id'; // I'm using the right ones in my code
const ZOOM_CLIENT_SECRET = 'my_client_secret';
const ZOOM_CALLBACK_URI = 'http://localhost:4000/oauth-callback';
const PORT = 4000;

app.get('/', (req, res) => {
  res.redirect(`https://zoom.us/oauth/authorize?response_type=code&client_id=${ZOOM_CLIENT_ID}&redirect_uri=${ZOOM_CALLBACK_URI}
`);
});

app.get('/oauth-callback', async (req, res) => {
  const b64 = Buffer.from(`${ZOOM_CLIENT_ID}:${ZOOM_CLIENT_SECRET}`).toString(
    'base64'
  );

  const opts = {
    headers: {
      'content-type': 'application/x-www-form-urlencoded',
      Authorization: 'Basic ' + b64,
    },

    params: {
      code: req.query.code,
      grant_type: 'authorization_code',
      redirect_uri: 'http://localhost:4000/oauth-callback',
    },
  };

  try {
    const { data } = await axios.post(
      `https://zoom.us/oauth/token`,
      null,
      opts
    );
    
    console.log(data);
   
    const config = {
      headers: {
        Authorization: 'Bearer ' + data.access_token,
      },
    };

    const token = data.access_token;
    
    const response = await axios.get(
      'https://api.zoom.us/v2/metrics/meetings/3560826516/participants',
      config
    );
    
    res.json(response.data);
  } catch (error) {
    console.log(error);
    res.status(error.response.status).json({ message: error.message });
  }
});

app.listen(PORT, () => {
  console.log(`app launched on port ${PORT} :)`);
});