dummy function in javascript to adapt an object

So basically, what I'm trying to do is to create a dummy function on an object that does nothing, its only purpose is to be called by another function (I'm passing the object which has this dummy function as a parameter of another function).

Here is a sample code of what I'm trying to achieve:

Calling function

exports.user = function(req, res, next, id) {
  if (!id) {
    res.status(401);
    return next(new Error('Invalid ID.'));
  }
  // get user from db assign it to a req object property
  ....
  req.user = user;
  next(false);
};

Specially crafted object

var req = {
  status: function() {}
};
users.user(req, null, next, id);

Then the next callback will use the req.user value.

I can go and redefine another version of exports.user function, which does not call status but I feel like I'm repeating myself.

My question is: is this not advised in JavaScript? or is there a better way to do it?

This does look like a mixture of Adapter pattern, or Null Object pattern.