onOriginRequest hook is called whenever the resolver needs to call a remote service. It can be enabled for all Operations, or for specific ones. Using this hook, you're able to completely rewrite the request, headers, etc.
This hook is useful, e.g. when you'd like to sign requests or when you have to get a one time short-lived access token.
user: The user object when the user is authenticated
clientRequest: The original client request object, including Headers
log: The logger object
internalClient: The internal client object
response: The response object (only for postResolve hooks)
input: The input object (only for Operation hooks)
internalClient, you're able to securely call into all defined Operations, e.g. to talk to a database or another service to enrich a response or manipulate the inputs of an Operation.