A text code confirms your number for alerts

When someone turns on Seascape's alerts, we now text a 6-digit code to the number they typed. Alerts start only after they enter it, so nobody can sign someone else's phone up for your shop's alerts.

Settings → Text alerts, signup and team invites — tick the box, press the button, and we text a code to that mobile. Enter it and alerts are on. The code works for 10 minutes; you can ask for a new one after a minute.
Already getting alerts? Nothing changes for you. Settings → Text alerts shows a "Confirm your number" button if you'd like to confirm it anyway.
Replying STOP or START still works exactly as before.