implement database as a class for tests

back/db/utils/mail.ts

@@ -23,6 +23,7 @@ export async function findRoomByOwner(ownerId: number): Promise<{ room_id: numbe
 }
 
 export async function getUserIdOfMailbox(boxId: number): Promise<{ user_id: number }[]> {
+    console.log("fuckdsvreghiu")
     const query = `
         SELECT app_account.user_id
         FROM mailbox