Sample code to assume role and generate temporary credentials using async/await

AWS STS generate credentials using async-await.js

const AWS = require('aws-sdk');

const sts = new AWS.STS();

(async () => {
  try {
    const data = await sts.assumeRole({
      DurationSeconds: 3600,
      ExternalId: '1234-1234-1234-1234-1234',
      RoleArn: "Your Role ARN",
      RoleSessionName: 'abc',
    }).promise();
    console.log(data);
  } catch (e) {
    console.log(e);
  }
})();