Document default password for VM
I needed to unlock the macOS VM keychain in my ssh session so that i can code-sign an iOS app for my connected device to the VM, password was 'vagrant' (i just guessed it based on the created ssh user name).
security -v unlock-keychain -p "vagrant" /Users/vagrant/Library/Keychains/login.keychain
Would be nice to show the user account passwords in the minicoin docs somewhere