depp nessted match mattern

deep-match.rs

match connect_database() {
  Ok(mut conn) => match conn.fetch_user() {
    Ok(user) => conn.get_post(user.id) {
      Ok(post) => conn.get_comments(post.id) {
        Ok(_comments) => println!("We got the coments"),
        Err(_) => println!("its error, no comment") 
      }
      Err(_) => println!("Can't find post")
    }
    Err(_) => println!("Can't find user")
  }
  Err(_) => println!("Database connetion failed")
}