Filepond revert method for delete does not send unique file id

I am trying to intergrate File Pond with my Flask server and I can not find the unique file id it sends with requests. With normal uploads it will show me request data on the server, but without the unique ID I am looking for. I want to use this unique ID to attach to a database in order to delete the file if the revert is sent later.

Going over the docs, it is suppsoed to send a unique ID with every upload, but I can’t tell if it’s a bad config in file pond or I suck at reading request.files. Just ignore all my prints where I try to read the contents of request.

Here is my FilePond Config:

    FilePond.setOptions({
        //allowImageEdit: true,
        //allowImageCrop: true,
        //allowMultiple: true,
        //allowFileEncode: true,
        allowImageExifOrientation: true,
        credits: false,
        server: {
            process: {
                url: './pondupload',
                method: 'POST',
                headers: {
                    'x-customheader': 'Hello World',
                },
                withCredentials: document.getElementById('csrf_token'),
                onload: (response) => response.key,
                onerror: (response) => response.data,
                ondata: (formData) => {
                    formData.append('csrf_token', document.getElementById('csrf_token').value)
                    return formData;
                },
            },
            revert: './pondupload',
            restore: './restore/',
            load: './load/',
            fetch: './fetch/',
        },
    });

Here is my route in flask:

@bp.route('/pondupload', methods=['POST', 'DELETE'])
def pondupload():
    print ('data: '+str(request.data))
    print('form: '+str(request.form))
    print('files: '+str(request.files))
    print('args: '+str(request.args))
    form=EmptyForm()
    #TODO add csrf to revert
    if request.method == "DELETE":
        print('delete stuff')
    if request.method == "POST" and form.validate_on_submit():
        upload_dir = current_app.config['UPLOAD_FOLDER']
        fn = ""
        file_names = []
        # get file object from request.files (see: http://flask.pocoo.org/docs/1.0/api/#flask.Request.files)
        for key in request.files:
            print('key: '+str(key))
            file = request.files[key]
            fn = secure_filename(file.filename)
            if allowed_file(fn) == True:
                file_names.append(fn)
                try:
                    file.save(os.path.join(upload_dir, fn))
                    return jsonify({}), 200
                except:
                    return jsonify(filename=file_names), 402
    return jsonify({}), 400