You'll get the Google Docs Integration settings in Settings > App Settings > Integration > Google Docs.
You've to integrate Google Docs & Google Drive to enable the API. Please follow the steps below to integrate:
After publishing, the status should be In production.
Copy the Authorized redirect URI from RISE, follow the below screenshot and paste the URI in the URIs input box.
Great! You are almost ready. Go back to the RISE.
Note: To remove this warning message, please click on the Learn more link. There is a process to verify your app. That's a different part and don't have anything to do in RISE.
Congratulations! All done. You are ready to use the Google Documents inside the RISE.