mfaConfiguration

Displays the state of multi-factor authentication (MFA) as on, off, or optional. When ON, all users must set up MFA before they can sign in. When OPTIONAL, your application must make a client-side determination of whether a user wants to register an MFA device. For user pools with adaptive authentication with threat protection, choose OPTIONAL.

When MfaConfiguration is OPTIONAL, managed login doesn't automatically prompt users to set up MFA. Amazon Cognito generates MFA prompts in API responses and in managed login for users who have chosen and configured a preferred MFA factor.