ConfigOptional.rs

//in src/main.rs
pub mod config;
use config::Config;
use serenity::{
  prelude::*,
  model::prelude::*,
  Client,
};
struct Handler;
impl EventHandler for Handler {
  fn message(&self, context: Context, msg: Message) {
    unimplemented!();
  }
}
fn main() {
  let _ = Config::new().save();
  let config = Config::load().unwrap();
  let mut client = Client::new(config.token(), Handler)
    .expect("Couldn't create the new client!");
  if let Err(why) = client.start() {
    println!("Client error: {}", why)
  }
}