feat: graceful shutdown, try making join and leave work (but some bug fixes are still needed)

src/command/mod.rs

@@ -3,9 +3,10 @@ use std::{fmt::Debug, sync::Arc};
 use futures::future::BoxFuture;
 use patricia_tree::StringPatriciaMap;
 use songbird::Songbird;
+use tokio_util::sync::CancellationToken;
 use twilight_model::{
     application::{command::Command, interaction::Interaction},
-    id::{Id, marker::ApplicationMarker},
+    id::{Id, marker::{ApplicationMarker, UserMarker}},
 };
 
 use crate::VCs;
@@ -16,8 +17,10 @@ mod opt_out;
 
 #[derive(Debug, Clone)]
 pub struct State {
-    pub discord_client: Arc<twilight_http::Client>,
+    pub cancellation_token: CancellationToken,
     pub discord_application_id: Id<ApplicationMarker>,
+    pub discord_client: Arc<twilight_http::Client>,
+    pub discord_user_id: Id<UserMarker>,
     pub songbird: Arc<Songbird>,
     pub vcs: Arc<VCs>,
 }