Prerequisite: Go SDK 1.10.2, Dep, github.com/aws/aws-lambda-go
Target: Auth0 implementors, AWS Freelancers, Contractors,
and Lambda Developers
Custom Authorizer for handling RS256 and HS256 Auth0 tokens for authorizing access to API
Gateway. Creates a properly formatted Policy Document that after validating the token
"Allows" access to "Invoke" your API.