pub trait CommandHandler<T>:
    Send
    + Sync
    + 'static {
    // Required method
    fn handle_command<'life0, 'async_trait>(
        &'life0 self,
        req: T,
    ) -> Pin<Box<dyn Future<Output = Result<(), String>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait;
}Expand description
Trait for a type that can handle a command from the ngrok dashboard.