@Bean
        public MultifactorAuthenticationProvider simpleProvider() {
            return new TestMultifactorAuthenticationProvider("mfa-simple");
        }
This is {@link RegisteredServicePrincipalAttributeMultifactorAuthenticationTriggerTests}.

@author Misagh Moayyed
@since 6.1.0
core/cas-server-core-authentication-mfa/src/test/java/org/apereo/cas/authentication/mfa/trigger/RegisteredServicePrincipalAttributeMultifactorAuthenticationTriggerTests.java