Laravel Request facade NOT getting FormData

I trying to save a picture from vuejs frontend to laravel backend. I used jquey ajax to sent the form data.

var mydata = new FormData();
mydata.append('mypic', blob);

           $.ajax(myurl, {
              method: "POST",
              headers: {
                  'Authorization':'Bearer ' + mytoken,
                  'Content-Type':'application/json'
              },
              data: mydata,
              processData: false,
              contentType: false,
              success: function () {
                console.log('Upload success');
              },
              error: function () {
                console.log('Upload error');
              }
            });

In laravel, i tried

return $request->all();

but it returns an empty array. I also tried to log the $request with laravel Log

Log::info($request);

But it logs an empty array in the laravel.log file

[2017-09-04 03:55:50] local.INFO: array (
)  

I thought the formData.append() was not working, so I log the formData

// Display the key/value pairs
        for (var pair of mydata.entries()) {
            console.log(pair[0]+ ', ' + pair[1]); 
        }

This worked well. It logs the entry I appended to fromdata. I don't understand why laravel Request facade is not getting it.

via Chebli Mohamed