How to get Pi-Hole password if installed from CLI

Due to issues I installed pi-hole as follows

  1. Stop Umbrel: sudo scripts/stop
  2. Reboot your system: sudo reboot
  3. Start Umbrel: sudo scripts/start
  4. Uninstall Pi-hole: sudo scripts/app uninstall pi-hole
  5. Install Pi-hole: sudo scripts/app install pi-hole

source

It works now, but I didn’t receive a password so I can’t login. How can I set or extract a password?

Turns out it is not that hard to do. Login in the running pi-hole container and reset the password

$>  pihole -a -p

but how do you login to the running pi-hole container??