Serving local directories with cloudflared built-in fileserver

Would like to have similar functionality in cloudflared as currently ngrok provides:
Serving local directories with cloudflared's built-in fileserver

This is how it's implemented in ngrok:
_ngrok can serve local file system directories by using its own built-in fileserver, no separate server needed! You can serve files using the file:// scheme when specifying the forwarding URL._

_Share a folder on your computer with authentication_
_ngrok http -auth="user:password" file:///Users/alan/share_

Hope this could be also implemented with cloudflared in the future!