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: example.rs
    path of file: ./repos/libsql/libsql/examples
    
    the code of the file until where you have to start completion: use libsql::Builder;

#[tokio::main]
async fn main() {
    let db = if let Ok(url) = std::env::var("LIBSQL_URL") {
        let token = std::env::var("LIBSQL_AUTH_TOKEN").unwrap_or_else(|_| {
            println!("LIBSQL_TOKEN not set, using empty token...");
            "".to_string()
        });

        Builder::new_remote(url, token).build().await.unwrap()
    } else {
        Builder::new_loca
    
async fn main() {
    let db = if let Ok(url) = std::env::var("LIBSQL_URL") {
        let token = std::env::var("LIBSQL_AUTH_TOKEN").unwrap_or_else(|_| {
            println!("LIBSQL_TOKEN not set, using empty token...");
            "".to_string()
        });

        Builder::new_remote(url, token).build().await.unwrap()
    } else {
        Builder::new_local(":memory:").build().await.unwrap()
    };

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

    conn.query("select 1; select 1;", ()).await.unwrap();

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

    let mut stmt = conn
        .prepare("INSERT INTO users (email) VALUES (?1)")
        .await
        .unwrap();

    stmt.execute(["foo@example.com"]).await.unwrap();

    let mut stmt = conn
        .prepare("SELECT * FROM users WHERE email = ?1")
        .await
        .unwrap();

    let mut rows = stmt.query(["foo@example.com"]).await.unwrap();

    let row = rows.next().await.unwrap().unwrap();

    let value = row.get_value(0).unwrap();

    println!("Row: {:?}", value);
}