Check if Twitter, Facebook, LinkedIn username(email) already exists

In my website I want to check if emailId the user types in is associated with any of Twitter/Facebook/LinkedIn.

Searching on got me in touch with this link. I found accepted answer would help me for the twitter case.. But the email parameter 开发者_Go百科is deprecated by twitter,

Is there any way to check and accomplish the thing I am trying to do for any or all of the Twitter/Facebook/LinkedIn?

This is only currently available with Facebook. You would call the graph API with any access token with this url: /search?q=zuck@fb.com&type=user. Twitter killed this from their API and LinkedIn never had it as part of their public API.