ircbot: update readme for openshift_sre to include the APIs necessary to enable
## On-Call and Shift Lead Rotation
-**IMPORTANT** https://cloud.google.com/storage/docs/authentication#service_accounts
+**IMPORTANT**
A Google Cloud service account JSON file is required to be able to access
- Google Sheet documents.
+ Google Sheet documents. Additionally, the "Drive API" and "Sheets API"
+ must be enabled for the project.
+
+* Creating a service account: https://cloud.google.com/storage/docs/authentication#service_accounts
+* Enabling the APIs (see steps 2 & 3): https://pygsheets.readthedocs.io/en/latest/authorizing.html
***
