use mongodb::bson::DateTime;
use std::time::{Duration, SystemTime};
#[inline]
pub fn now_and_expires_at(ttl: Duration) -> (DateTime, DateTime) {
let now = SystemTime::now();
let expires_at = now + ttl;
let now = DateTime::from_system_time(now);
let expires_at = DateTime::from_system_time(expires_at);
(now, expires_at)
}