index.js

const UserType = new GraphQLObjectType({
  name: 'User',
  fields: {
    id: { type: GraphQLID },
    name: { type: GraphQLString },
  },
})

const schema = new GraphQLSchema({
  query: new GraphQLObjectType({
    name: 'Query',
    fields: {
      user: {
        type: UserType,
        resolve: () => ({ id: 1, name: "Alice" })
      },
    },
  }),
})