API Gateway -> Lambda -> Apollo -> AppSync -> GitHub API

index.js

const query = require('./query.js');

require('es6-promise').polyfill();

exports.handler = function(event, context, callback) {
    query(event["queryStringParameters"]['username']).then(function(data){

        var resp = {
            "isBase64Encoded": false,
            "statusCode": 200,
            "headers": {
                'Content-Type': 'text/html'
            },
            "body": "<h1>" + data + "</h1>"
        }

        callback(null, resp);
    });
}

package.json

{
  "name": "HelloWorldBBC",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "dependencies": {
    "apollo-cache-inmemory": "^1.1.0",
    "apollo-client": "^2.0.3",
    "apollo-link": "^1.0.3",
    "apollo-link-http": "^1.2.0",
    "aws-sdk": "^2.141.0",
    "aws-appsync": "^1.0.0",
    "es6-promise": "^4.1.1",
    "graphql": "^0.11.7",
    "graphql-tag": "^2.5.0",
    "isomorphic-fetch": "^2.2.1",
    "ws": "^3.3.1"
  }
}

query.js

"use strict";

polyfillGlobalScope();

const gql = require('graphql-tag');
const API_KEY_AUTH_TYPE = require('aws-appsync/lib/link/auth-link').AUTH_TYPE.API_KEY;
const AWSAppSyncClient = require('aws-appsync').default;

const query = function (username) {
    return gql(`
        query{
            getUser(username: "${username}"){
                name
            }
        }
    `);
};
const client = new AWSAppSyncClient({
    url: 'https://YOUR_APP_SYNC_ID.appsync-api.YOUR_REGION.amazonaws.com/graphql',
    region: 'YOUR_REGION',
    auth: {
        type: API_KEY_AUTH_TYPE,
        apiKey: 'YOUR_APP_SYNC_API_KEY_HERE',
    },
    disableOffline: true
});

function polyfillGlobalScope(){
    require('es6-promise').polyfill();
    require('isomorphic-fetch');
}

module.exports = function(username) {
    return client.hydrated().then(function (client) {
        client.query({ query: query(username) })

        return client.query({ query: query(username), fetchPolicy: 'network-only' })
            .then(function logData(data) {
                return data.data.getUser.name + "!";
            })
            .catch(console.error);
    });
}