trying to convert mysql rows to json array

`auto usersQuery = dbClient->execSqlAsyncFuture("SELECT id,name from users");

try{ auto users = usersQuery.get(); //how to convert users (drogon::orm::Result) to json::Value array ? auto resp=HttpResponse::newHttpJsonResponse(ret); callback(resp); return; } catch (const drogon::orm::DrogonDbException &e) { std::cerr << "gameinfo error:" << e.base().what() << std::endl; }`