How to create api credential file:

1. go to https://console.developers.google.com/
2. click dashboard
3. create project
4. name the project something
5. leave org option and save
6. at the top of the next page search for calendar
7. select Google Calendar API
8. click enable
9. click API's & Services small text in the top left corner
10. click credentials and Create credentals, then Oauth client id
11. set app type to Other
12. click on OAuth consent screen
13. make up an app name
14. under scope, select option: View events on all your calendars with readonly lock icon
15. save
16. click on credentails again and there will be a download option beside your credentail. Download the .json file and save to the same directory as the script and rename to api_secrets.json
17. run the script and a browser should popup prompting to allow the application.
18. once you have provided consent, the script should now work.

Install script dependencies (Python 3.x) pip install -r requirements.txt