Yes, correct, that plugin is archived, because I haven’t used it in years and I don’t know if it works at all. (In particular there’s a login flow tweak in there that is probably no longer functional.) In any case, forking is an option.
We use Amazon SNS to do the same thing now, using: GitHub - discourse/discourse-amazon-sns
I am realizing now that it doesn’t have any documentation. It shouldn’t be too hard, the plugin only has a few settings. I’ll make a note to write a documentation topic, but @Mohsin136 if you’re familiar at all with SNS, you can give this a shot. And if it works, I would gladly accept your rough notes as a source for a documentation topic (it would save me some time).