How to Set Up a GraphQL Server (with Node and Express)Whether you love it or hate it, there’s no denying it’s a powerful tool to have under your belt. We define a schema for our User and a top-level (or “root”) Query schema that will validate our main query. Click “Query” to see what that schema looks like: Inside our “Query” is our “User.” We were also able to pass an argument to our query and look up a specific user by their id.