update jwt_secret value

 import jwt from "jsonwebtoken";
 import { PrismaClient } from "@prisma/client";
 
-export const APP_SECRET = "a"; // TODO : value update to object
-
 export const prisma = new PrismaClient();
 
 export const getUserId = (context) => {
   const Authorization = context.request.get("Authorization");
   if (Authorization) {
     const token = Authorization.replace("Bearer ", "");
-    const { userId } = jwt.verify(token, APP_SECRET);
+    const { userId } = jwt.verify(token, process.env.JWT_SECRET);
     return userId;
   }
   throw new Error("There is no vaild user");