Mongoose $push from HTML Form not working

Can anyone tell me what am I doing wrong.

My HTML Form:

 <form action="/user/:id" method="put">
    <div class="form-group">
        <label>Miles</label>
        <input type="text" class="form-control" name="miles">
    </div>
    <button type="submit" class="btn btn-warning btn-lg">Login</button>
</form>

My Express Route:

  app.put('/user/:id', function(req, res) {
      User.findById(req.body.params.id, function(err, user) {
        if (err)
            res.send(err);
            console.log(user.id);

           User.findByIdAndUpdate(
                      user.id,
                      {$push: {"milesLog": {miles: req.body.miles}}},
                      {safe: true, upsert: true},

                      function(err, model) {
                      console.log(err);
                     },
                         res.json(user)

   );

Posting from my HTML form I get the following Error:

  Cannot GET /user?miles=66&activity=asdasd

But When I test this through POSTMAN it works:

What am I doing wrong. Why doesn't it work from my HTML Form?