Verify a phone number

Submits the SMS code from Register a phone number. On success the account is created, an API key is issued, and a first phone number is provisioned — the response is identical to the sign-in outcome of Verify a sign-up code. The API key is returned only once — store it immediately.

If provisioning fails you receive a 502 and may retry this call with the same registrationId; the phone number stays verified, so no new code is needed.

Note that phoneNumber in the response is the Dial number provisioned for the account, not the number you just verified.