start on repond to message (basic input and builder for dm)

back/db/Room-db.ts

@@ -0,0 +1,12 @@
+import { execQueryAsync } from "./db";
+
+export async function getRoomOwner(roomId: number) {
+    const query = `
+        SELECT address.email
+        FROM app_room
+        INNER JOIN address ON address.address_id = app_room.owner_id
+        WHERE app_room.room_id = ?
+    `;
+    const values = [roomId];
+    return await execQueryAsync(query, values);
+}