registrationSendPhoneValidation
Send a validation code the the given phone number. Returns the transactionId that should be passed to registrationValidatePhoneNumber 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.
registrationSendPhoneValidation(
input: RegistrationSendPhoneValidationInput!
): RegistrationSendPhoneValidationPayload!