Function timeout_at 

pub async fn timeout_at<F>(
    deadline: Instant,
    future: F,
) -> Result<<F as Future>::Output, Elapsed>
where
    F: Future,

Available on crate features runtime and time only.

Require a Future to complete before the specified instant in time.

If the future completes before the instant is reached, then the completed value is returned. Otherwise, an error is returned.