Shutdown ssh Macosx password required
### Issue
I can't shutdown my PC because I need to include password in my command.

### Configuration
```
"accessories": [
{
      "name" : "Hackintosh",
      "accessory" : "NetworkDevice",
      "pingInterval" : 45,
      "mac" : "<mac-address>",
      "ip" : "192.168.1.35",
      "wakeGraceTime" : 10,
      "wakeCommand" : "ssh yayo@192.168.1.35 caffeinate -u -t 300",
      "shutdownCommand" : "ssh yayo@192.168.1.35 sudo shutdown -h now",
      "shutdownGraceTime" : 15
    },
```

I just try to use the shutdownCommand that I'm using in config.json in terminal and password required.