System prerequisites

1. Java 8 should be installed in your system.

How to run

Move to project directory

cd google-oauth-calendar-events

Run as gradle application with gradle wrapper

./gradlew run

When application run successfully go to your browser and enter http://localhost:8080/

Note :

I have considered at least 1 hour free time as available slot.

Links

1. https://www.balbooa.com/gridbox-documentation/how-to-get-google-client-id-and-client-secret
2. https://console.cloud.google.com/apis