But the target customers are developers. If this is simply a productized Twilio API, then it's not a huge time savings for a developer. If you need to verify

But the target customers are developers. If this is simply a productized Twilio API, then it's not a huge time savings for a developer. If you need to verify users, it means your app is structured such that there's already a back end, and you already need to store a user record. Generating a random number, putting it in the user record, and calling a Twilio API isn't really a huge drag.