sendContactPhoneValidation
Needed when a user changes their phone number - sends a validation code to the given phone number. Returns the transactionId that should be passed to validateContactPhoneNumber when the user next enters a code.
The following errors may be returned: BAD_USER_INPUT - if the phone number is not valid. EXPIRED- thrown if too many send attempts have been made to the same phone number.
sendContactPhoneValidation(
input: SendContactPhoneValidationInput!
): SendContactPhoneValidationPayload!