Getting error when first starting server in the tutorial

Bắt đầu với schema.js và kiểm tra template literal gql bằng cách đối chiếu với các định nghĩa kiểu được hiển thị trong tutorial; sau đó kiểm tra index.js để xác nhận schema được tải như thế nào. Chạy server và xác minh rằng tutorial khởi động mà không có SyntaxError đã được báo cáo.

I'm sure it's something I'm doing wrong, but I've just started the tutorial and when I first try to start the server I get

type Launch {
^^^^^^

SyntaxError: Unexpected identifier
at new Script (vm.js:74:7)
at createScript (vm.js:246:10)
at Object.runInThisContext (vm.js:298:10)
at Module._compile (internal/modules/cjs/loader.js:657:28)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:700:10)
at Module.load (internal/modules/cjs/loader.js:599:32)
at tryModuleLoad (internal/modules/cjs/loader.js:538:12)
at Function.Module._load (internal/modules/cjs/loader.js:530:3)
at Module.require (internal/modules/cjs/loader.js:637:17)
at require (internal/modules/cjs/helpers.js:20:18)
[nodemon] app crashed - waiting for file changes before starting...

My schema.js file is

const { gql } = require('apollo-server');

const typeDefs = gql``

module.exports = typeDefs;


type Launch {
  id: ID!
    site: String
  mission: Mission
  rocket: Rocket
  isBooked: Boolean!
}

type Rocket {
  id: ID!
    name: String
  type: String
}

type User {
  id: ID!
    email: String!
    trips: [Launch]!
}

type Mission {
  name: String
  missionPatch(size: PatchSize): String
}

enum PatchSize {
  SMALL
  LARGE
}

type Mutation {
  # if false, booking trips failed -- check errors
  bookTrips(launchIds: [ID]!): TripUpdateResponse!

    # if false, cancellation failed -- check errors
  cancelTrip(launchId: ID!): TripUpdateResponse!

    login(email: String): String # login token
}

type Query {
  launches: [Launch]!
    launch(id: ID!): Launch
  # Queries for the current user
  me: User
}

and index.js is

const { ApolloServer } = require('apollo-server');
const typeDefs = require('./schema');

const server = new ApolloServer({ typeDefs });

server.listen().then(({ url }) => {
  console.log(`🚀 Server ready at ${url}`);
});

Not sure where the error lies as I was simply copying code from the tutorial....thanks for any clues.