Importing Remote GraphQL Schema into Gridsome

const { setContext } = require('apollo-link-context');
const { HttpLink } = require('apollo-link-http');
const { introspectSchema, makeRemoteExecutableSchema } = require('graphql-tools');
const fetch = require('node-fetch');

module.exports = function(api) {
  api.createSchema(async function(graphql) {
    const http = new HttpLink({
      uri: 'http://example.com/api',
      fetch
    });

    const link = setContext((request, previousContext) => ({
      headers: {
        Authorization: `Bearer JSmxi5ocIhjKGENvgK66TrlqoylAPy8ZeAckiyo-4txKkYhdKSfLlPXLnxoghZm3`
      }
    })).concat(http);

    const schema = await introspectSchema(link);
    const executableSchema = await makeRemoteExecutableSchema({
      schema: schema,
      link
    });

    return executableSchema;
  });
};

https://pastebin.com/uTwYZBeh
https://pastebin.com/t7JQPaPg

These are the two functions I created and called them from gridsome.server.config
I hope it helps.