Make sure the following topic provides a visible cross-reference for more information on how to create the secret: https://access.redhat.com/documentation/en-us/openshift_container_platform/4.5/html/logging/cluster-logging-external#annotations:e9d64c04-4323-49a7-a51a-bd2530ff130a

This information seems to be implied in the current version. However, I recommend asking an SME what types of secrets are supported, researching internal and external topics that answer this question, and then making sure the text or "Additional resources" section provides links to the appropriate topics.