diff --git a/src/db/mod.ts b/src/db/mod.ts
index ec64ebf..8f201a3 100644
--- a/src/db/mod.ts
+++ b/src/db/mod.ts
@@ -2,6 +2,7 @@ import {
 	Credential,
 	Group,
 	Machine,
+	type Ref,
 	type Ressource,
 	Service,
 	User,
@@ -58,6 +59,15 @@ export class Db {
 			list: (
 				filter: (ressource: T) => boolean | Promise<boolean> = () => true,
 			) => this.#list<T>(type, Builder, filter),
+			listRef: async (
+				filter: (ressource: T) => boolean | Promise<boolean> = () => true,
+			) => {
+				const ressources: Ref<T>[] = []
+				for await (const ressource of this.#list<T>(type, Builder, filter)) {
+					ressources.push(ressource.toRef() as Ref<T>)
+				}
+				return ressources
+			},
 		}
 	}