Sending bulk SMS in Node.js using Twilio

ACCOUNT_SID = 'Your_Account_Sid'
AUTH_TOKEN = 'Your_Auth_Token'
SERVICE_SID = 'Your_Service_Sid'
const client = require('twilio')(ACCOUNT_SID, AUTH_TOKEN);
 
// User-defined function to send bulk SMS to desired
// numbers bypassing numbers list as parameter
function sendBulkMessages(messageBody, numberList)
{
    var numbers = [];
    for(i = 0; i < numberList.length; i++)
    {
        numbers.push(JSON.stringify({ 
            binding_type: 'sms', address: numberList[i]}))
    }
 
    const notificationOpts = {
      toBinding: numbers,
      body: messageBody,
    };
 
    client.notify
    .services(SERVICE_SID)
    .notifications.create(notificationOpts)
    .then(notification => console.log(notification.sid))
    .catch(error => console.log(error));
}
   
// Sending our custom message to all numbers
// mentioned in array.
sendBulkMessages('Greeting from geeksforgeeks',
      ['number1', 'number2']) // Example +919999999999