const result = await WPP.group.addParticipants('[group@g.us]', [number@c.us]);
// Get participant result:
console.log(result['123@c.us'].code);
console.log(result['123@c.us'].invite_code);
console.log(result['123@c.us'].invite_code_exp);
console.log(result['123@c.us'].message);
console.log(result['123@c.us'].wid);
const memberResult = result['123@c.us']; // To a variable
// or
const memberResult = Object.values(result)[0]; // Always the first member result
// How to send a custom invite link
const link = 'https://chat.whatsapp.com/' + result['123@c.us'].invite_code;
console.log(link);
Add one or more participants to a group
The method return a object with the result of each participant as the key