Tailscale unattend does not connect after reboot

Commiand line
Tailscale up --authkey:------- --unattended

after reboot does not login again, even though the deamon tailscaled service is running

Tailscale authentication needed

on
Windows 10 Pro environment, Tailscale 1.30

Resolved.
this is what i did
gennerated a non-reusable auth key
ran the tail scale command line on the system

disabled key expiry for trusted machines via the provider admin console.

next I ran the following commands on the windows computer
tailscale down
tailscale up (no paramenters this time)
Rebooted and the system was connected in the dash board