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我有以下 rust 代码，对于我的生活，我无法解决为什么我会遇到与此值有关的借用检查器问题，以及为什么它会作为 while 循环的一部分被移动。

代码：

#[tokio::main]
async fn main() -> Fallible<()> {
    let config = Config::new().expect("config can't be loaded");
    logger::config(&config.log);
    
    let bn = Binance::with_credential(
        &config.exchanges.binance_com.api_key,
        &config.exchanges.binance_com.api_secret,
    );

    let mut db = Database::new(config).await;

    match bn.user_stream_start()?.await {
        Ok(_) => {
            let mut ws = BinanceWebsocket::default();

            for sub in vec![Subscription::Trade("btcusdt".to_string())] {
                ws.subscribe(sub).await?;
            }

            while let Some(msg) = ws.try_next().await? {
                db.write(msg).await?
            }
        }
        Err(e) => error!("Error obtaining stream: {}", e),
    };
    Ok(())
}

错误：

error[E0382]: use of moved value: `db`
  --> x/src/main.rs:35:17
   |
24 |     let mut db = Database::new(config).await;
   |         ------ move occurs because `db` has type `Database`, which does not implement the `Copy` trait
...
35 |                 db.write(msg).await?
   |                 ^^ value moved here, in previous iteration of loop

error: aborting due to previous error; 1 warning emitted

For more information about this error, try `rustc --explain E0382`.

非常感谢任何帮助

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