How to get Post with form data?

In the documentation it says:

"How about a POST request, with form data, or JSON? Same thing, journey will parse the data, and pass it as the last argument to the bound function."

router.post('/').bind(function (req, res, params) {
console.log(params);
res.send(200, {"Content-Type":"application/json"}, params);
});

But I'm getting back empty for params or whatever else I call the last argument.

Start with the documented router.post('/') example and the request-binding behavior it describes. Reproduce the POST with form data or JSON and inspect how the last bound-function argument is populated. Done means submitted data is available in params as documented, or the documentation clearly explains the supported request format and behavior.

Written by the indexing model from the issue text.