"I lost the bootstrap token before creating an admin account"

If no admin account has been created yet, you can re-display the token:

sudo /opt/bng-deploy/bin/show-bootstrap-token.sh

This script prints the token to stdout only if the system is still in the
pre-bootstrap state (no admin exists). If an admin has already been created,
the script exits with an error rather than printing a stale or invalid token.