Using https://developers.google.com/google-apps/calendar/quickstart/ruby api for google calendar and event listing.
When running that code getting this error at SCOPE = Google::Apis::CalendarV3::AUTH_CALENDAR_READONLY
I have google-api-client (= 0.8.2) gem
I see that you're using 0.8.2 gem. According to this google github post, you ought to use
Google::APIClient.new
instead of
Google::Apis