You can change the root password after first boot the same way you would do with Raspbian or Armbian image. We just want to shorten the time the device is runni

You can change the root password after first boot the same way you would do with Raspbian or Armbian image. We just want to shorten the time the device is running with a default password. You can think of that entered password as it is a temporary one. Wifi configuration is completely optional. You can leave it unconfigured and do it later over serial line. We don't keep any credentials on our servers.