diff --git a/src/CRUD/Users.ts b/src/CRUD/Users.ts
index c0af824..4bbc4da 100644
--- a/src/CRUD/Users.ts
+++ b/src/CRUD/Users.ts
@@ -1,4 +1,5 @@
 import {LRUCache} from "../Utils/DataStructures/LRUCache.js";
+import {TTLCache} from "../Utils/DataStructures/TTLCache.js";
 import {client} from "../Client.js";
 import {Database} from "../Database.js";
 import {SimpleUser} from "../Typings/DatabaseTypes.js";
@@ -6,7 +7,19 @@ import {User} from "discord.js";
 
 const cache = new LRUCache<SimpleUser['id'], SimpleUser>(1000);
 
-const INVALID_USER_IDS = new Set<User['id']>();
+class TTLSet<K> { // stop complaining about many things mr. musicmaker
+    #cache: TTLCache<K, null>;  // lets be big-brain here cuz we gotta lock in 
+
+    constructor(ttl?: number) {
+        this.#cache = new TTLCache(ttl);
+    }
+
+    add(key: K): void { this.#cache.set(key, null); } 
+    has(key: K): boolean { return this.#cache.has(key); }
+    delete(key: K): void { this.#cache.delete(key); }
+}
+
+const INVALID_USER_IDS = new TTLSet<User['id']>();
 
 export async function SaveUser(user: User | SimpleUser): Promise<void> {
 	const connection = await Database.getConnection();
@@ -72,4 +85,4 @@ export async function DiscardUser(id: string | bigint): Promise<void> {
 export async function DANGER_PurgeUser(id: string | bigint): Promise<void> {
 	id = BigInt(id);
 	await Database.query('DELETE FROM Users WHERE id = ?', [id]);
-}
\ No newline at end of file
+}