/// Show how long the command ran
    #[structopt(long)]
    duration: bool,

        if args.duration {
            header.push(Cell::new("duration").add_attribute(Attribute::Bold))
        };

            if args.duration {
                row.push(format_duration(entry.time_start, entry.time_finished))
            }

}
fn format_duration(time_start: DateTime<Utc>, time_finished: DateTime<Utc>) -> String {
    let duration = time_finished - time_start;
    duration.to_string()