Dropzone: Submit both form data and dropzone at once

myDropzone.on("sending", function(file, xhr, formData) { 

 formData.append("fieldname1", $('field-name-1').val());  

});

var myDropzone = new Dropzone(".profile-image-upload",
    {
        paramName: "uploadfile",
        url: "/API/PeopleAPI/EditAsync",
        maxFiles: 1,
        headers: getData(),
        uploadMultiple: false,
        autoProcessQueue: false,
        maxFilesize: 20,
        acceptedFiles: "image",
        dictMaxFilesExceeded: "You can only upload 1 image",
        dictDefaultMessage: "",
    });

function getData() {
        var data = {
            //person
            UserName: $('#UserName').val(),
            AspNetUserID: '@Model.AspNetUserID',
            Roles: $('#UserRoles').val(),
            FirstName: $('#FirstName').val(),
            Email: $('#Email').val(),
            LastName: $('#LastName').val(),
            Gender: $('#Gender').val(),
            Password: $('#Password').val(),
            //address
            AddressLine1: $('#AddressLine1').val(),
            AddressLine2: $('#AddressLine2').val(),
            Town: $('#Town').val(),
            RegionID: $('#RegionID').val(),
            RegionName: $('#RegionID :selected').text(),
            City: $('#City').val(),
            CountyID: $('#CountyID').val(),
            CountyName: $('#CountyID :selected').text(),
            PostCode: $('#PostCode').val(),
          __RequestVerificationToken: $('[name="__RequestVerificationToken"').val()
        };
        return data;
    }