Summarize Recognized Auth Keys

Review the list of supported output plugins and distill the authorization options into a common set of opinionated secret keys to be used when generating configuration. The list should matrix:

• Key name for secret
• Description of what this key represents
• The config parameter for a specific output type
• Identify required combinations for the output to not be dropped by CLF (e.g. username/password)

The opinionated key and description will be used by the documentation team for customer documentation