resolvers.js

const resolvers = {
  Query: {
    user: (root, args) => db.getUser(argd.id),
    users: () => db.getUsers(),
  },
  Mutation: {
    createUser: (root, args) => db.createUser(args.name),
    updateUser: (root, args) => db.updateUser(args.id, args.name),
    deleteUser: (root, args) => db.deleteUser(args.id),
  }
}