Obj.users is an array of users in the form of objects, I want to add an additional property i:e "priority" to the each user object. Since I don't have the index of each user's object so I'm trying to update it with the loop variable but when I console.log it, It's not getting updated.

Obj.users and interests are both arrays.

router.get("/", auth, async function (req, res) {
  const { email, interests } = req.user;
  const obj = {};
  var counter = 0;
  obj.users = await User.find(req.user._id);
  for (var i of obj.users) {
    for (var j of interests) {
      if (i.interests.includes(j)) {
        counter = counter + 1;
      }
    }
    i.priority = counter;
    counter = 0;
  }
  console.log(obj.users);
});