In Node.js
const olptoken = require('olptoken');
token = olptoken.getToken(OLP_TOKEN_URL, OLP_KEY_ID, OLP_KEY_SECRET);
In browser
<script src="https://www.unpkg.com/olptoken"> </script>
olpGetToken(OLP_KEY_ID, OLP_KEY_SECRET,
function cb(data) {
// token in data.access_token
});