whatsapp API integrated with google sheets

I am looking for someone to help me integrate the WhatsApp API with my Google Sheets data. I would like for the API to be securely integrated with my system, so that this data remains safe and secure. The main functionality that I am looking for is for automatic notifications to be sent via WhatsApp to my customers. The API should be integrated using the REST API, Graph API, or SOAP API. I need someone who is an expert in API integration and can deliver a reliable solution.