Microsoft Graph API with Simple-OAuth2 and Client Credentials Flow - node.js

Question

I'm trying to log users with Client Credentials Flow with Simple-OAuth2 in a NodeJS website.
My routes/index.js is this:
var express = require('express');
var router = express.Router();
var authHelper = require('../helpers/auth');
router.get('/', async function(req, res, next) {
let parms = { title: 'Home', active: { home: true } };
const accessToken = await authHelper.accessToken;
res.render('index', parms);
});
module.exports = router;
And my auth.js is this:
const credentials = {
client: {
id: process.env.APP_ID,
secret: process.env.APP_PASSWORD,
},
auth: {
tokenHost: 'https://login.microsoftonline.com',
authorizePath: "common/oauth2/v2.0/authorize",
tokenPath: "common/oauth2/v2.0/token",
}
};
const oauth2 = require('simple-oauth2').create(credentials);
const tokenConfig = {
username: 'uuuuuu#dddddd.com',
password: 'ppppppp',
scope: process.env.APP_SCOPES,
};
try {
const result = await oauth2.ownerPassword.getToken(tokenConfig);
const accessToken = oauth2.accessToken.create(result);
} catch (error) {
console.log('Access Token Error', error.message);
}
exports.accessToken = accessToken;
When I try to start website, nodejs shows me a sintax error:
const result = await oauth2.ownerPassword.getToken(tokenConfig);
^^^^^
SyntaxError: await is only valid in async function
This error does not make much sense to me since the code is provided by simple-oauth2.
Could someone shed light on my actual error?

Answer 1

Well you have to wrap your code into async function so you could use await key word in that function. You cna find more info here.
In your case I would wrap code into function and export that function like this:
const credentials = {
client: {
id: process.env.APP_ID,
secret: process.env.APP_PASSWORD,
},
auth: {
tokenHost: 'https://login.microsoftonline.com',
authorizePath: "common/oauth2/v2.0/authorize",
tokenPath: "common/oauth2/v2.0/token",
}
};
const oauth2 = require('simple-oauth2').create(credentials);
const tokenConfig = {
username: 'uuuuuu#dddddd.com',
password: 'ppppppp',
scope: process.env.APP_SCOPES,
};
const getAccessToken = async () => {
try {
const result = await oauth2.ownerPassword.getToken(tokenConfig);
const accessToken = oauth2.accessToken.create(result);
return accessToken;
} catch (error) {
console.log('Access Token Error', error.message);
return null;
}
};
exports.getAccessToken = getAccessToken;
And then you can use that function like this:
var express = require('express');
var router = express.Router();
var authHelper = require('../helpers/auth');
router.get('/', async function(req, res, next) {
let parms = { title: 'Home', active: { home: true } };
const accessToken = await authHelper.getAccessToken();
res.render('index', parms);
});
module.exports = router;