post https://api.sandbox-v2.vault.ist/reg/user/phone
This endpoint allows you to create a phone number for the user. If no confirmation code is provided, a new confirmation code will be sent, and a 202 status code will be returned. If a confirmation code is provided, it will be validated, and the phone number will be created, returning a 200 status code. > NOTE: The phone number must include a '+' sign.
The 'phone ' number must include a '+' sign.