Using client script to retrieve data from the Zoho CRM API

client_script_using_zoho_crm_api.js

const userId = $Crm.user.id;

const userData = ZDK.Apps.CRM.Users.fetchById(userId);
let phoneNumber = userData._phone;

const twilioFromNumberRecords = ZDK.Apps.CRM.Twiliosmsextension0__Twilio_From_Numbers.searchByCriteria(`Owner:equals:${userId}`);
if (twilioFromNumberRecords.length > 0) {
    phoneNumber = twilioFromNumberRecords[0]._Name;
}

const callbackNumberField = ZDK.UI.getElementByID('callback_number');
callbackNumberField.setContent(phoneNumber);