fix: don't parse the 'username' and 'password' key

tessen wasn't excluding 'username' and 'password' as a key from the menu
which isn't expected behaviour because the value of username is
determined from the basename of the selected file and password is
selected from the first line of the file
-----BEGIN PGP SIGNATURE-----

iHUEABYIAB0WIQTgVhDyNH/Z8QffkfaIX7fuGN4o2QUCYYan1AAKCRCIX7fuGN4o
2V/kAQDeP9wthNw4KYTdqwHP+0b1CGb2reBdAZSf93goG8iGpwD+I6dcc27P3/Md
bq2lwL3H3eP4f71+o08dqLjwANvYGw4=
=HZ20
-----END PGP SIGNATURE-----