Apollo GraphQL fullstack tutorial Schema

schema.graphql

type Query {
  launches(
    pageSize: Int
    after: String
  ): LaunchConnection!
  launch(id: ID!): Launch
  me: User
}
type Mutation {
  bookTrips(launchIds: [ID]!): TripUpdateResponse!
  cancelTrip(launchId: ID!): TripUpdateResponse!
  login(email: String): String # login token
}
type TripUpdateResponse {
  success: Boolean!
  message: String
  launches: [Launch]
}
type LaunchConnection {
  cursor: String!
  hasMore: Boolean!
  launches: [Launch]!
}
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
}

Taken from https://github.com/apollographql/fullstack-tutorial/blob/master/final/server/src/schema.js