Working with GraphQL Schema

schema {
  query: Query
  mutation: Mutation
  subscription: Subscription
}

type Query {
  hello: String!
  user(id: ID!): User
}

type User {
  id: ID!
  name: String!
  email: String!
}

type Query {
  me: User
  users(first: Int = 20, after: String): UserConnection!
  product(id: ID!): Product
}

type Mutation {
  createUser(input: CreateUserInput!): CreateUserPayload!
}

type CreateUserPayload {
  user: User
  errors: [UserError!]!
}

type Subscription {
  messageAdded(channelId: ID!): Message!
}

"""A registered customer of the platform."""
type User {
  "Globally unique identifier"
  id: ID!
  """
  Display name. **May be null** for anonymous users.
  """
  name: String
}

import { loadFilesSync } from "@graphql-tools/load-files";
import { mergeTypeDefs } from "@graphql-tools/merge";

const typeDefs = mergeTypeDefs(
  loadFilesSync("./src/**/*.graphql")
);

# users/schema.graphql
type Query

extend type Query {
  me: User
  user(id: ID!): User
}