mfa
Multi-Factor Authentication (MFA) configuration for the User Pool. Defaults of OFF. Valid values are OFF (MFA Tokens are not required), ON (MFA is required for all users to sign in; requires at least one of sms_configuration or software_token_mfa_configuration to be configured), or OPTIONAL (MFA Will be required only for individual users who have MFA Enabled; requires at least one of sms_configuration or software_token_mfa_configuration to be configured).