Add 'expires' to cookie.

controllers/user.js

@@ -98,7 +98,8 @@ const setCookie = (res, name, value)=>{
     res.cookie(name, value, {
         httpOnly: true,
         secure: process.env.NODE_ENV === "production",
-        signed: true
+        signed: true,
+        expires: new Date(2050, 12, 12)
     });
 }