Running 42.2 with KDE Plasma v5.8.6 Desktop.

I need to integrate KOrganizer with Google Calendar (because that is what others are already using!).

I went through the steps of Settings>Configure Organizer>Calendars>Add and could not find Google Calendar to select. Should this still work?
I have read several threads here which I didn't really understand but it seems others do not have the same problem. Am I missing something?
Please can somebody help me get this working.
Budgie