[Feature Request] Fingerprint prompting for tramp

Hi Tramp Development Team,

Would it be possible to add the prompts sudo gives for fingerprint 
authentication to the prompts for tramp? Currently it does accept the 
fingerprint, however it doesn't show a prompt or give an option to 
cancel it and go to password authentication instead, instead timing out 
and erroring.

When sudo prompts for fingerprint is gives "Place your finger on the 
fingerprint reader", times out with the message "Verification timed out" 
after 30 seconds and sends to password verification (at least when run 
from shell). Alternatively if you want to cancel fingerprint auth and go 
straight to password, you can send Ctrl+C.

Currently when I try to use tramp (and don't use the fingerprint reader) 
it times out after 15 seconds with tramp-error: Timeout reached, see 
buffer ´*tramp/sudo root@localhost*´ for details, a buffer which 
contains "Place your finger on the fingerprint reader". With fprintd 
enabled in my /etc/pam.d/sudo I currently have no way of using password 
in tramp (unless I add a script that detects being within tramp and 
skips fprint).

I hope this can be implemented! I should be able to test an 
implementation if someone can work on it (provided I find out how to) if 
needed.

Many Thanks,
Neri


N.B. I initially asked this on Emacs StackExchange 
<https://emacs.stackexchange.com/questions/82363/circumvent-sudo-fingerprint-in-tramp> 
where it was suggested to request here.