Initiate an SMS or email-based challenge by sending a verification code to a given phone number or email address.
cURL
curl --request POST \ --url https://api.authsignal.com/v1/challenge \ --header 'Content-Type: application/json' \ --data '{ "verificationMethod": "SMS", "action": "signInWithSms", "phoneNumber": "+64271234567" }'
{ "challengeId": "<string>" }
OK
The response is of type object.
object
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