How to Start and Stop systemd services through dbus?

I tried to connect to the bus and run commands
but with each time trying to connect to systemd, the program runs into infinite loop.

```js
const dbus = require("dbus");

const someBus = dbus.getBus('system');

someBus.getInterface('org.freedesktop.systemd1',
  '/org/freedesktop/systemd1',
  (err, interface) => {
  if (err) throw new Error(err)
  console.log(interface)
})
```
