OTP Done Right: Expiry, Retries and Stopping Abuse
Sending an SMS code takes an afternoon. Making it hard to abuse takes a few deliberate choices. Here are the ones that matter most.
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Sending an SMS code takes an afternoon. Making it hard to abuse takes a few deliberate choices. Here are the ones that matter most.
Want to confirm a phone number really belongs to your user? You only need two API calls: one to send a code and one to check it. We'll walk through both.