All SMS OTP SDK methods require you to initiate an action first.
Check out our guide on SMS authentication for more details.
Enroll SMS
Start enrollment for a new SMS OTP authenticator by sending the user an SMS containing an OTP code. This method is typically used when you’ve not yet verified the user’s phone number.If you’ve already verified a user’s phone number independently of Authsignal, you can
alternatively use a Server SDK to enroll the user
programmatically.
Parameters
string
The user’s phone number in E.164 format e.g. +14155552671.
Response
AuthsignalResponse<void>
Challenge SMS
Start an SMS challenge by sending the user an SMS containing an OTP code.Response
AuthsignalResponse<void>
Verify SMS
Finish enrolling or re-authenticating a new or existing SMS OTP authenticator by verifying the code submitted by the user.Parameters
string
The OTP code inputted by the user.