1function doRequest(url) {
2  return new Promise(function (resolve, reject) {
3    request(url, function (error, res, body) {
4      if (!error && res.statusCode == 200) {
5        resolve(body);
6      } else {
7        reject(error);
8      }
9    });
10  });
11}
12
13// Usage:
14
15async function main() {
16  let res = await doRequest(url);
17  console.log(res);
18}
19
20main();

1app.post('/signup', async(req, res) => {
2  try {
3    const { email, firstName } = req.body
4    const user = new User({ email, firstName })
5    const ret = await user.save()
6    res.json(ret)
7  } catch (error) {
8    console.log(error)
9  }
10})
11

1app.post('/signup', async(req, res, next) => {
2  async function runAsync () {
3    await firstThing()
4    await secondThing()
5  }
6
7  runAsync()
8    .catch(next)
9})
10