Future that sleep for certain milliseconds and return a string

Rust - sleep.rs

use std::thread::sleep;
use std::time::Duration;
use anyhow::Result;

#[tokio::main]
async fn main() -> Result<()> {
	sleep_and_run_and_return_string(1000).await;
	println!("I have been waiting for 1 seconds");
	Ok(())
}

async fn sleep_and_run_and_return_string(millisecond: u64) -> String {
	sleep(Duration::from_millis(millisecond));
	String::from("Hello guys!")
}