text: module.exports = `
    type Query{
      getAllBooks: [Book]
      getBookById(id: String!): Book
    }
    type Mutation{
      postBook(title:String! author:String! price: Int!): Book!
      deleteBook(id:String!): Book
      updateBook(title:String! author:String! price: Int! id:String!): Book!
    }
    type Book{
      _id: String!
      title: String!
      author: String!
      price: Int!
    }
  `;
  