Problem with vscode extension: open(), devices() don't work.

[xucs007]

I don't know if I did it right, but when I tried it in my vscode extension code,
the open(), devices() both failed. I'm trying to debug a usb device from vscode:

typescript code:

import * as AHID from node-hid-async;                                                                                                                                                  
let ahid = new AHID.NodeHidAsync(); 
let devices = await ahid.devices(); 
let device = await ahid.open(vid, pid);