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: replica.rs
    path of file: ./repos/libsql/libsql/examples
    
    the code of the file until where you have to start completion: use libsql::{Builder, Cipher, EncryptionConfig, Value};
use std::time::Duration;

#[tokio::main]
async fn main() {
    tracing_subscriber::fmt::init();

    let db_file = tempfile::NamedTempFile::new().unwrap();
    println!("Database {}", db_file.path().display());

    let auth_token = std::env::var("LIBSQL_AUTH_TOKEN").unwrap_or_else(|_| {
        println!("Using empty token since LIBSQL_TOKEN was not set");
        "".to_string()
    });

    let url = std::env::var("LIBSQL_URL")
        .unwrap_or_else(|_| {
            println!("Using empty token since LIBSQL_URL was not set");
            "http://localhost:8080".to_string()
        })
        .replace("libsql", "https");

    let db = if cfg!(feature = "encryption") {
        let encryption_config = EncryptionConfig {
            cipher: Cipher::Aes256Cbc,
            encryption_key: "s3cr3t".into(),
        };
        Builder::new_remote_replica(db_file.path(), url, auth_token)
            .encryption_config(encryption_config)
            .build()
            .await
            .unwrap()
    } else {
        Builder::new_remote_replica(db_file.path(), url, auth_token)
            .build()
            .await
            .unwrap()
    };

    let conn = db.connect().unwrap();

    let f = db.sync().await.unwrap();
    println!("inital sync complete, frame no: {f:?}");

    conn.execute("CREATE TABLE IF NOT EXISTS foo (x TEXT)", ())
        .await
        .unwrap();

    db.sync().await.unwrap();

    let mut jh = tokio::spawn(async move {
        let mut rows = conn
            .query(
                "INSERT INTO foo (x) VALUES (?1) RETURNING *",
                vec![Value::from(
                    "this value was written by an embedded replica!",
                )],
            )
            .await
            .unwrap();

        println!("Rows insert call");
        while let Some(row) = rows.next().await.unwrap() {
            println!("Row: {}", row.get_str(0).unwrap());
        }

        println!("--------");

        let mut rows = conn.query("SELECT * FROM foo", ()).await.unwrap();

        println!("Rows coming from a read after write call");
        while let Some(row) = rows.next().await.unwrap() {
            println!("Row: {}", row.get_str(0).unwrap());
        }

        println!("--------");
    });

    loop {
        tokio::select! {
            _ = tokio::time::sleep(Duration::from_secs(1)) => {
                let r = d
    
async fn main() {
    tracing_subscriber::fmt::init();

    let db_file = tempfile::NamedTempFile::new().unwrap();
    println!("Database {}", db_file.path().display());

    let auth_token = std::env::var("LIBSQL_AUTH_TOKEN").unwrap_or_else(|_| {
        println!("Using empty token since LIBSQL_TOKEN was not set");
        "".to_string()
    });

    let url = std::env::var("LIBSQL_URL")
        .unwrap_or_else(|_| {
            println!("Using empty token since LIBSQL_URL was not set");
            "http://localhost:8080".to_string()
        })
        .replace("libsql", "https");

    let db = if cfg!(feature = "encryption") {
        let encryption_config = EncryptionConfig {
            cipher: Cipher::Aes256Cbc,
            encryption_key: "s3cr3t".into(),
        };
        Builder::new_remote_replica(db_file.path(), url, auth_token)
            .encryption_config(encryption_config)
            .build()
            .await
            .unwrap()
    } else {
        Builder::new_remote_replica(db_file.path(), url, auth_token)
            .build()
            .await
            .unwrap()
    };

    let conn = db.connect().unwrap();

    let f = db.sync().await.unwrap();
    println!("inital sync complete, frame no: {f:?}");

    conn.execute("CREATE TABLE IF NOT EXISTS foo (x TEXT)", ())
        .await
        .unwrap();

    db.sync().await.unwrap();

    let mut jh = tokio::spawn(async move {
        let mut rows = conn
            .query(
                "INSERT INTO foo (x) VALUES (?1) RETURNING *",
                vec![Value::from(
                    "this value was written by an embedded replica!",
                )],
            )
            .await
            .unwrap();

        println!("Rows insert call");
        while let Some(row) = rows.next().await.unwrap() {
            println!("Row: {}", row.get_str(0).unwrap());
        }

        println!("--------");

        let mut rows = conn.query("SELECT * FROM foo", ()).await.unwrap();

        println!("Rows coming from a read after write call");
        while let Some(row) = rows.next().await.unwrap() {
            println!("Row: {}", row.get_str(0).unwrap());
        }

        println!("--------");
    });

    loop {
        tokio::select! {
            _ = tokio::time::sleep(Duration::from_secs(1)) => {
                let r = db.sync().await.unwrap();
                println!("replicated until index {r:?}");
            }

            r = &mut jh => {
                r.unwrap();
                return;
            }
        }
    }
}