Ask HN: How to get User's info based on their Twitter Id?

I posted this question earlier but looks like it was not the right time to post and unfortunately didn't get enough responses as I was expecting. So wanted to give it one more shot. So, the issue is, I want to get user's info based on his Twitter Id, like.. GitHub, LinkedIn, StackOverflow, Facebook, Flickr, HackerNews, etc. I looked at Rapleaf but it needs User's email address which I don't have since Twitter doesn't return that info. Rapportive is doing good job but not sure what service they are using. Also they use user's email address to get more info. Any help would be really appreciated. Thanks :)