Current command:
lf em 4x50 wrpwd --help
Writes EM4x50 password. usage: lf em 4x50 wrpwd [-h] -p <hex> -n <hex> options: -h, --help This help -p, --pwd <hex> password, 4 hex bytes, lsb -n, --new <hex> new password, 4 hex bytes, lsb examples/notes: lf em 4x50 wrpwd -p 4f22e7ff -n 12345678