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: fix_invalid_submissions.rs
    path of file: ./repos/AtCoderProblems/atcoder-problems-backend/src/bin
    
    the code of the file until where you have to start completion: use atcoder_client::AtCoderClient;
use atcoder_problems_backend::crawler::FixCrawler;
use atcoder_problems_backend::utils::init_log_config;
use chrono::Utc;
use log::info;
use sql_client::initialize_pool;
use std::env;

const 
    
async fn main() {
    init_log_config().unwrap();
    info!("Started");
    let url = env::var("SQL_URL").expect("SQL_URL must be set.");
    let username = env::var("ATCODER_USERNAME").expect("ATCODER_USERNAME is not set.");
    let password = env::var("ATCODER_PASSWORD").expect("ATCODER_PASSWORD is not set.");

    let db = initialize_pool(&url).await.unwrap();
    let now = Utc::now().timestamp();
    let client = AtCoderClient::new(&username, &password)
        .await
        .expect("AtCoder authentication failure");
    let crawler = FixCrawler::new(db, client, now - ONE_DAY);
    crawler.crawl().await.expect("Failed to crawl");
    info!("Finished fixing.");
}