auto result = pg_cluster_->Execute(
                    userver::storages::postgres::ClusterHostType::kMaster,
                    "SELECT * FROM hello_schema.couriers"
                    "WHERE $1 = courier_id", courier_id
                    );
                userver::formats::json::ValueBuilder valueBuilder;
                for(const auto& row : result){
                    userver::formats::json::ValueBuilder builder;
                    builder["courier_id"] = row["courier_id"].As<int>();
                    builder["courier_type"] = row["courier_type"];
                    for(const auto& iterator : row["regions"]){
                        builder["regions"].PushBack(std::move(iterator));
                    }
                    builder["regions"] = row["regions"];
                    builder["working_hours"] = row["working_hours"];
                    valueBuilder.PushBack(std::move(builder));
                }