@Override
    public boolean provision(final Principal principal, final Credential credential) {
        return provision(credential, Optional.empty(), 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