What is [Outdated] of "account binding template" code sample?

[irongineer]

Hi,

I've started developing Slack App with Bolt recently.
I'd like to know how to bind user accounts between Slack and my web app, so I came here from the "Code samples:" link on the following Slack site.
https://api.slack.com/best-practices/blueprints/account-binding

I have a question about the sample code you have published.
In the README of Glitch sample code, you say "[Outdated] This example is outdated, but still works!"

https://glitch.com/edit/#!/slack-account-binding-blueprint?path=README.md:1:0

I couldn't understood what is outdated because I'm new for developing Slack App.
Is there any references or examples for an up-to-date implementation of user account binding?
If not, I would be grateful if you could tell me what exactly is Outdated, and how to change the implementation.

Thank you very much.

[JannesMeyer]

I have the same question.

Maybe it's outdated because it doesn't use Bolt?