You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: lib.rs
    path of file: ./repos/rivet/svc/pkg/load-test/standalone/mm/src
    
    the code of the file until where you have to start completion: use futures_util::{StreamExt, TryStreamExt};
use proto::backend::{self, pkg::*};
use rivet_api::{
	apis::{configuration::Configuration, matchmaker_lobbies_api},
	models,
};
use rivet_claims::ClaimsDecode;
use rivet_operation::prelude::*;
use serde_json::json;
use tokio::{io::AsyncWriteExt, net::TcpStream, time::Duration};

const LOBBY_GROUP_NAME_ID: &str = "test";
const CHUNK_SIZE: usize = 2048;
const BUFFER_SIZE: usize = 16;

struct Ctx {
	op_ctx: OperationContext<()>,
	conns: Vec<Conn>,
	namespace_id: Uuid,
	primary_region_name_id: String,
	config: Configuration,
}


    
async fn find_lobby(ctx: &Ctx) -> GlobalResult<models::MatchmakerFindLobbyResponse> {
	let res = matchmaker_lobbies_api::matchmaker_lobbies_find(
		&ctx.config,
		models::MatchmakerLobbiesFindRequest {
			game_modes: vec![LOBBY_GROUP_NAME_ID.to_string()],
			prevent_auto_create_lobby: None,
			regions: None,
			verification_data: None,
			captcha: Some(Box::new(models::CaptchaConfig {
				hcaptcha: Some(Box::new(models::CaptchaConfigHcaptcha {
					client_response: "10000000-aaaa-bbbb-cccc-000000000001".to_string(),
				})),
				turnstile: None,
			})),
			tags: None,
			max_players: None,
		},
		None,
	)
	.await?;

	Ok(res)
}