NO QR code on terminal

[kazim-asif]

• wbm.start() is not generating QR code on terminal.
  I am using the code on official documentation

const wbm = require('wbm');

wbm.start().then(async () => {
const contacts = [
{ phone: '5535988841854', name: 'Bruno', group: 'friend' },
{ phone: '5535988841854', name: 'Will', group: 'customer' }
];
for (contact of contacts) {
let message = 'hi';
if(contact.group === 'customer') {
message = 'Good morning ' + contact.name;
}
else if(contact.group === 'friend') {
message = 'Hey ' + contact.name + '. Wassup?';
}
await wbm.sendTo(contact.phone, message);
}
await wbm.end();
}).catch(err => console.log(err));