I took a look at https://fusionauth.io/learn/expert-advice/authentication/webapp/oauth-authorization-code-grant-sessions/ and will try to switch over to using this method since it seems well documented. I will probably need to find someone to update the themes if I get it going. Good luck on that!

I really like the diagram which shows the message flows in it. Is there a document, just like oauth-authorization-code-grant-sessions but for passwordless? That diagram, but for passwordless, would definately help.

That code is javascript. You should be able to use a function like https://www.php.net/manual/en/function.base64-encode.php to do the same.

We don't have any documentation on moving to Auth0. Here's info on import users to Auth0: https://auth0.com/docs/users/import-and-export-users but I haven't tested that. Looks like you need to build a JSON file to import users: https://auth0.com/docs/users/import-and-export-users/bulk-user-import-database-schema-and-examples

You'll probably want to read directly from the FusionAuth database.

Not sure about the other configuration.

Sorry to hear FusionAuth didn't meet your needs, but I hope your app is a wild success!

function base64URLEncode(str) {
  return str.toString('base64')
    .replace(/\+/g, '-')
    .replace(/\//g, '_')
    .replace(/=/g, '');
}

I don't know what language this is in. Where can I find a php version?

I also saw a document up here on porting from fusionAuth to auth0. I am considering going the other way. Do you guys have a document describing how to do that?

Thanks for the update! I definitely understand the struggle of getting an integration to work the way that you expect it to. I see that my colleagues have (re)posted your help requested posts; hopefully, someone from the community can lend a helping hand!

Thanks,
Josh