scalar Void

type Query {
  booksMany: [Book!]!
  bookOne(id: ID!): Book!
}

type Mutation {
  signUp(input: SignUpInput!): Void
  login(input: LoginInput!): Session!
  logout: Void
}

input SignUpInput {
  email: String!
  username: String!
  password: String!
}

input LoginInput {
  email: String!
  password: String!
}

type Session {
  accessToken: String!
}

type Book {
  id: ID!
  title: String!
  author: String!
}