Set bnd global variables. The key can be wildcarded.
[ -b, --base64 ] - Show key in base64
[ -c, --clear ] - Clear all the settings, including the public and
private key
[ -g, --generate ] - Generate a new private/public key pair
[ -l, --location <string> ] - Override the default "~/.bnd/settings.json"
location
[ -m, --mac ] - Sign the strings on the commandline
[ -p, --password <[c> ] - Password for local file
[ -P, --publicKey ] - Show the public key
[ -s, --secretKey ] - Show the private secret key