public static function get_request_types() {
        return [
            api::DATAREQUEST_TYPE_EXPORT => get_string('requesttypeexport', 'tool_dataprivacy'),
            api::DATAREQUEST_TYPE_DELETE => get_string('requesttypedelete', 'tool_dataprivacy'),
            api::DATAREQUEST_TYPE_OTHERS => get_string('requesttypeothers', 'tool_dataprivacy'),
        ];
    }