Facebook Authentication

Article author
Duncan from Memberstack

This article will show you how to add a "Continue with Facebook" button to your signup, login, and profile forms. Part one is a 3-minute video with step-by-step instructions to connect your Memberstack account and Facebook Developer account. Part two will show you how to set up the front end. 

Important: If you are having errors please make sure you are copying and pasting the actual Client Secret and not ****.

Part 1: The Backend

Here's a link to the Facebook Developer site.

If you watch this video above and test your site, you'll most likely see a banner during signup that says "Submit for Login Review." To remove that banner and to switch to live mode...
  1. You must provide a valid Privacy Policy URL and a Data Deletion Instructions URL. You can update both of these inputs in Basic Settings on the Facebook App Dashboard.
    - The Data Deletion Instructions URL is a page on your site that members can use to request their data be deleted.
  2. Click "Get Advanced Access" for email and public_profile.
    I had quite a bit of trouble getting the Facebook UI to load properly. If you experience difficulties, I recommend trying again in a private or incognito browser. 
  3. You must complete a Data Use Checkup.
  4. Toggle your app from test mode to live mode. 

Part 2: The Frontend



If you're using Memberstack's pre-built sign-up, login, or profile UI, then you're already finished. Enabled social auth providers will automatically appear in the pre-built UI. 

If you'd like to add a social auth button to your Webflow project this section is for you.

Sign up & Login Forms

I recommend copying one of our Webflow social auth buttons. They are 100% built in Webflow, already have the attributes you need, and are easy to customize:

A) Light Theme Facebook Button
B) Dark Theme Facebook Button.

To create your own from scratch:

  1. Review Facebook's Branding Guidelines for Sign-in buttons. 
  2. Create a link block with the attribute data-ms-auth-provider="facebook".
  3. Add the Facebook logo.
  4. Add your button text. We recommend something like "Continue with Facebook"

That's it for signup and login buttons. Profile buttons have a few additional elements.

Profile Forms

In this other tutorial, we'll create a UI for members to connect providers, view previously connected providers, and (optionally) disconnect providers. 

Social Auth Buttons in Profile Forms


Errors are usually caused by a miss-matched redirect URI. Click here to learn more. 


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1 comment

  • Comment author
    Vinícius Blembeel

    I've gone up to the frontend implementation of the button and did all the facebook integration on the backend part. But upon clicking the button, I get an error

    {"error":"JsonWebTokenError: jwt must be provided"}

    How do I solve this?


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