Body
The verification method to use for the challenge.
SMS, EMAIL_OTP The action code used to identify the challenge in the Authsignal Portal.
The phone number in E.164 format. Required if the verification method is 'SMS'.
The email address. Required if the verification method is 'EMAIL_OTP'.
The primary ID of the user in your system. Required when initiating a challenge to enroll or update an authenticator for an existing user.
Providing scopes will authorize enrolling or updating an authenticator for an existing user. Must only be provided when initiating a challenge from an already authenticated state.
add:authenticators, update:authenticators, add:authenticators update:authenticators The channel to use for sending the SMS challenge. 'DEFAULT' will use regular SMS, while 'WHATSAPP' will use WhatsApp. Only applicable if the verification method is 'SMS'.
DEFAULT, WHATSAPP The user's locale in BCP 47 format. Used to localize email and SMS messages.
"en"

