/etc/xpilot-ng/password.txt is in xpilot-ng-server 1:4.7.3-2.2ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 | # set this to a unique word and chmod 600 this file:
# password: \override: XXX
|