private static SamlMetadataDocument extractAttributeValuesFrom(final Map<String, AttributeValue> item) {
        val builder = SamlMetadataDocument.builder()
            .name(item.get(SamlRegisteredServiceMetadataColumns.NAME.getColumnName()).s())
            .value(item.get(SamlRegisteredServiceMetadataColumns.VALUE.getColumnName()).s());
        val signature = item.get(SamlRegisteredServiceMetadataColumns.SIGNATURE.getColumnName());
        if (signature != null) {
            builder.signature(signature.s());
        }
        return builder.build();
    }
This is {@link DynamoDbSamlRegisteredServiceMetadataResolver}.

@author Misagh Moayyed
@since 7.2.0
support/cas-server-support-saml-idp-metadata-dynamodb/src/main/java/org/apereo/cas/support/saml/metadata/resolver/DynamoDbSamlRegisteredServiceMetadataResolver.java