What's Missing in Our Docs?

Hi,

Is there any single document or page from where I can get list of all keywords which can be used in serverless.yml file?

E.g. I found this hack useful for request header.

resources:
  Resources:
     ApiGatewayMethodApiRegisterPost:
        Properties:
          RequestParameters:
            "method.request.header.Authorization": true

But now I need to set the same for API Gateway Custom Authorizers.

Thanks
Shailesh