public void setMfa(CreateBackendAuthMFAConfig mfa) {
        this.mfa = mfa;
    }
<p>
Describes whether to apply multi-factor authentication policies for your Amazon Cognito user pool configured as a
part of your Amplify project.
</p>

@param mfa
       Describes whether to apply multi-factor authentication policies for your Amazon Cognito user pool
       configured as a part of your Amplify project.
aws-java-sdk-amplifybackend/src/main/java/com/amazonaws/services/amplifybackend/model/CreateBackendAuthUserPoolConfig.java