If my client create’s a post for a user via

createPost(userId: 'xyz')

, and I want to make an ajax call in an operationBefore hook, do I need to use graphcool-lib.api.request to get the userId’s details? Or is there a way to include that in the data/query that’s passed to my hook?

You’ll have to use graphcool-lib I’m pretty sure. That’s how I do it anyways...