Which frontend SDK do you use?

supertokens-web-js / mobile

supertokens-auth-react

3. Exposing Auth APIs

We will add all the backend APIs for auth on /.netlify/functions/auth/*. This can be changed by setting the apiBasePath property in the appInfo object on the backend and frontend. For the rest of this page, we will assume you are using /.netlify/functions/auth/*.

1) Create the netlify/functions/auth.js page

• Be sure to create the netlify/functions/ folder.
• An example of this can be found here.

netlify/functions/auth.ts

import supertokens from "supertokens-node";import { middleware } from "supertokens-node/framework/awsLambda";import middy from "@middy/core";import cors from "@middy/http-cors";import { getBackendConfig } from "../../config/supertokensConfig";
supertokens.init(getBackendConfig());
module.exports.handler = middy(middleware(async (event, context) => {    if (event.httpMethod === "OPTIONS") {        return {            statusCode: 200,            body: ""        }    }        return {        statusCode: 404,        body: "Not Found",    }})).use(    cors({        origin: getBackendConfig().appInfo.websiteDomain,        credentials: true,        headers: ["Content-Type", ...supertokens.getAllCORSHeaders()].join(", "),        methods: "OPTIONS,POST,GET,PUT,DELETE",    })).onError(request => {    throw request.error;});

important

• Notice that we called supertokens.init above. We will need to call this in all API endpoints that use any functions related to supertokens.
• CORS is only needed if you are hosting your frontend using a separate domain (if your website domain is different that your API's domain).