Required Good PHP Developer to make a small function in a PHP script purchased through codecanyon

I am looking for a skilled PHP developer to add a specific function to a PHP script that I have purchased through codecanyon. The function that I need to be added is to record and view WhatsApp messages.

The PHP script is related to WhatsApp tools where we can send bulk messages and use create chatbot. I know if the PHP script have the chatbot feature that means it is reading received messages and replying accordingly. I just want you to find that function and connect it with our google sheet via API which the script already provides.

Note: the script provides API for sending messages through WhatsApp and there’s no documentation or guide to know how to check received WhatsApp messages. The script uses Node.JS to send / receive messages.

Ideal skills and experience for this job include:
- Strong proficiency in PHP
- Experience with integrating external APIs
- Familiarity with WhatsApp messaging API
- Script is installed on VPS server with Node.JS
- Ability to work independently and problem-solve efficiently
- Attention to detail and accuracy in implementation.