minor changes

back/db/api-db.ts

@@ -128,7 +128,7 @@ export async function getMessages(roomId: number) {
     return await execQueryAsync(query, values);
 }
 
-export async function getMembers(roomId) {
+export async function getMembers(roomId: number) {
     const query = `
         SELECT
             address.address_id AS id,