If you have phone numbers stored in a Google Sheet, you might want an easy way to validate that those numbers are real. Luckily the Twilio Lookup API has free formatting and validation functionality and can easily integrate with Google Sheets using Google's Apps Script and Twilio Functions. Even if you've never used Twilio or an API before, if you're comfortable in Google Sheets then you're already a programmer in my book. I'm confident you can follow along and use this tutorial to add phone nu...