Lambda Shopify graphql proxy endpoint

graphql.js

const https = require("https")
const fetch = require("isomorphic-fetch")
const Account = require("./models/account")
const authenticated = require("./lib/auth")

exports.handler = authenticated(async (event, context) => {
  const { id: shopId, shopifyToken } = context.account

  try {
    const resp = await fetch(`https://${shopId}/admin/api/2019-07/graphql.json`, {
      method: "POST",
      headers: {
        "X-Shopify-Access-Token": shopifyToken,
        "Accept": "application/json",
        "Content-Type": "application/json"
      },
      body: event.body,
      agent: new https.Agent({
        ca: require("ssl-root-cas/latest").create()
      })
    })

    const text = await resp.text()

    return {
      statusCode: resp.status,
      headers: { "Content-Type": "application/json" },
      body: text
    }
  } catch(e) {
    return {
      statusCode: 400,
      headers: { "Content-Type": "application/json" },
      body: JSON.stringify({
        error: "Bad request",
        message: e.message
      })
    }
  }
})