@Override
    public boolean provision(final Authentication auth, final Credential credential,
                             final RegisteredService registeredService) {
        val principal = auth.getPrincipal();
        return provision(credential, Optional.ofNullable(registeredService), principal);
    }
This is {@link ScimPrincipalProvisioner}.

@author Misagh Moayyed
@since 5.1.0
support/cas-server-support-scim-core/src/main/java/org/apereo/cas/scim/v2/provisioning/ScimPrincipalProvisioner.java