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/labrinth/src
    
    the code of the file until where you have to start completion: use std::sync::Arc;

use actix_web::web;
use database::redis::RedisPool;
use log::{info, warn};
use queue::{
    analytics::AnalyticsQueue, payouts::PayoutsQueue, session::AuthQueue, socket::ActiveSockets,
};
use scheduler::Scheduler;
use sqlx::Postgres;
use tokio::sync::RwLock;

extern crate clickhouse as clickhouse_crate;
use clickhouse_crate::Client;
use util::cors::default_cors;

use crate::queue::moderation::AutomatedModerationQueue;
use crate::{
    queue::payouts::process_payout,
    search::indexing::index_projects,
    util::env::{parse_strings_from_var, parse_var},
};

pub mod auth;
pub mod clickhouse;
pub mod database;
pub mod file_hosting;
pub mod models;
pub mod queue;
pub mod ratelimit;
pub mod routes;
pub mod scheduler;
pub mod search;
pub mod util;
pub mod validate;

#[derive(Clone)]
pub struct Pepper {
    pub pepper: String,
}

#[derive(Clone)]
pub struct LabrinthConfig {
    pub pool: sqlx::Pool<Postgres>,
    pub redis_pool: RedisPool,

    
pub fn check_env_vars() -> bool {
    let mut failed = false;

    fn check_var<T: std::str::FromStr>(var: &'static str) -> bool {
        let check = parse_var::<T>(var).is_none();
        if check {
            warn!(
                "Variable `{}` missing in dotenv or not of type `{}`",
                var,
                std::any::type_name::<T>()
            );
        }
        check
    }

    failed |= check_var::<String>("SITE_URL");
    failed |= check_var::<String>("CDN_URL");
    failed |= check_var::<String>("LABRINTH_ADMIN_KEY");
    failed |= check_var::<String>("RATE_LIMIT_IGNORE_KEY");
    failed |= check_var::<String>("DATABASE_URL");
    failed |= check_var::<String>("MEILISEARCH_ADDR");
    failed |= check_var::<String>("MEILISEARCH_KEY");
    failed |= check_var::<String>("REDIS_URL");
    failed |= check_var::<String>("BIND_ADDR");
    failed |= check_var::<String>("SELF_ADDR");

    failed |= check_var::<String>("STORAGE_BACKEND");

    let storage_backend = dotenvy::var("STORAGE_BACKEND").ok();
    match storage_backend.as_deref() {
        Some("backblaze") => {
            failed |= check_var::<String>("BACKBLAZE_KEY_ID");
            failed |= check_var::<String>("BACKBLAZE_KEY");
            failed |= check_var::<String>("BACKBLAZE_BUCKET_ID");
        }
        Some("s3") => {
            failed |= check_var::<String>("S3_ACCESS_TOKEN");
            failed |= check_var::<String>("S3_SECRET");
            failed |= check_var::<String>("S3_URL");
            failed |= check_var::<String>("S3_REGION");
            failed |= check_var::<String>("S3_BUCKET_NAME");
        }
        Some("local") => {
            failed |= check_var::<String>("MOCK_FILE_PATH");
        }
        Some(backend) => {
            warn!("Variable `STORAGE_BACKEND` contains an invalid value: {}. Expected \"backblaze\", \"s3\", or \"local\".", backend);
            failed |= true;
        }
        _ => {
            warn!("Variable `STORAGE_BACKEND` is not set!");
            failed |= true;
        }
    }

    failed |= check_var::<usize>("LOCAL_INDEX_INTERVAL");
    failed |= check_var::<usize>("VERSION_INDEX_INTERVAL");

    if parse_strings_from_var("WHITELISTED_MODPACK_DOMAINS").is_none() {
        warn!("Variable `WHITELISTED_MODPACK_DOMAINS` missing in dotenv or not a json array of strings");
        failed |= true;
    }

    if parse_strings_from_var("ALLOWED_CALLBACK_URLS").is_none() {
        warn!("Variable `ALLOWED_CALLBACK_URLS` missing in dotenv or not a json array of strings");
        failed |= true;
    }

    failed |= check_var::<String>("GITHUB_CLIENT_ID");
    failed |= check_var::<String>("GITHUB_CLIENT_SECRET");
    failed |= check_var::<String>("GITLAB_CLIENT_ID");
    failed |= check_var::<String>("GITLAB_CLIENT_SECRET");
    failed |= check_var::<String>("DISCORD_CLIENT_ID");
    failed |= check_var::<String>("DISCORD_CLIENT_SECRET");
    failed |= check_var::<String>("MICROSOFT_CLIENT_ID");
    failed |= check_var::<String>("MICROSOFT_CLIENT_SECRET");
    failed |= check_var::<String>("GOOGLE_CLIENT_ID");
    failed |= check_var::<String>("GOOGLE_CLIENT_SECRET");
    failed |= check_var::<String>("STEAM_API_KEY");

    failed |= check_var::<String>("TREMENDOUS_API_URL");
    failed |= check_var::<String>("TREMENDOUS_API_KEY");
    failed |= check_var::<String>("TREMENDOUS_PRIVATE_KEY");

    failed |= check_var::<String>("PAYPAL_API_URL");
    failed |= check_var::<String>("PAYPAL_WEBHOOK_ID");
    failed |= check_var::<String>("PAYPAL_CLIENT_ID");
    failed |= check_var::<String>("PAYPAL_CLIENT_SECRET");

    failed |= check_var::<String>("TURNSTILE_SECRET");

    failed |= check_var::<String>("SMTP_USERNAME");
    failed |= check_var::<String>("SMTP_PASSWORD");
    failed |= check_var::<String>("SMTP_HOST");

    failed |= check_var::<String>("SITE_VERIFY_EMAIL_PATH");
    failed |= check_var::<String>("SITE_RESET_PASSWORD_PATH");

    failed |= check_var::<String>("BEEHIIV_PUBLICATION_ID");
    failed |= check_var::<String>("BEEHIIV_API_KEY");

    if parse_strings_from_var("ANALYTICS_ALLOWED_ORIGINS").is_none() {
        warn!(
            "Variable `ANALYTICS_ALLOWED_ORIGINS` missing in dotenv or not a json array of strings"
        );
        failed |= true;
    }

    failed |= check_var::<String>("CLICKHOUSE_URL");
    failed |= check_var::<String>("CLICKHOUSE_USER");
    failed |= check_var::<String>("CLICKHOUSE_PASSWORD");
    failed |= check_var::<String>("CLICKHOUSE_DATABASE");

    failed |= check_var::<String>("MAXMIND_LICENSE_KEY");

    failed |= check_var::<u64>("PAYOUTS_BUDGET");

    failed |= check_var::<String>("FLAME_ANVIL_URL");

    failed
}