// server 단에서 이렇게 쿼리를 만들면...
type Query {
  books: [Book]
  authors: [Author]
}

// client
query GetBooksAndAuthors {
	books {
		title
	}
authors: {
	name
}
}

// server
type Mutation {
  addBook(title: String, author: String): Book
}

// client
mutation CreateBook {
  addBook(title: "Fox in Socks", author: "Dr. Seuss") {
    title
    author {
      name
    }
  }
}