Reauth on Client Side about simple-koa-shopify-auth HOT 2 CLOSED

// NOTE: These are some of the imports different than your example, not every import that's needed.
// APOLLO NOTE: I'm using @apollo/client 3.5.7, which I think has different imports and requires different initialization than the version the docs use. You may be able to leave yours alone, but this is how I do it.
import { ApolloClient, createHttpLink, InMemoryCache } from "@apollo/client";

// Middleware fetch function for checking if user needs to reauthenticate when making apollo graphql requests
function userLoggedInFetch(app) {
  const fetchFunction = authenticatedFetch(app);

  return async (url, options) => {
    const response = await fetchFunction(url, options);

    // Check if reauthorization needed
    if (response.headers.get("X-Shopify-API-Request-Failure-Reauthorize") === "1") {
      const authUrl = response.headers.get("X-Shopify-API-Request-Failure-Reauthorize-Url");
      const redirect = Redirect.create(app);
      redirect.dispatch(Redirect.Action.APP, authUrl);
    }

    return response;
  };
}

// NOTE: See the note for the import statement above
function createApolloClient(app) {
  // For making authenticated GraphQL requests (actually requests to /graphql on our server, which proxies it to Shopify)
  return new ApolloClient({
    link: createHttpLink({
      fetch: userLoggedInFetch(app),
      credentials: "include",
      headers: { "Content-Type": "application/graphql" },
    }),
    cache: new InMemoryCache(),
  });
}

function createAuthAxios(app) {
  // For making authenticated HTTP requests via axios
  const authAxios = axios.create();
  const redirect = Redirect.create(app);

  // Intercept requests, and add Authorization header
  authAxios.interceptors.request.use((request) => {
    const { method, url } = request;
    // Get session token and add to header
    return getSessionToken(app)
      .then((token) => {
        request.headers["Authorization"] = `Bearer ${token}`; // Add auth token to request headers
        return request;
      })
      .catch((error) => {
        console.error("Error getting session token: " + error);
        return request;
      });
  });

  // Intercept response, and redirect to auth if necessary
  authAxios.interceptors.response.use(
    (response) => {
      // OK response
      return response;
    },
    (error) => {
      // Error response
      const response = error.response;
      // Check if reauthorization needed (headers are all lowercase)
      if (response.headers["x-shopify-api-request-failure-reauthorize"] === "1") {
        const authUrl =
          response.headers["x-shopify-api-request-failure-reauthorize-url"];
        redirect.dispatch(Redirect.Action.APP, authUrl);
      }
      throw error;
    }
  );

  return authAxios;
}