How to Check the Logged In User of Laravel 4 in Laravel 5?

I've to work with two Projects one of which is in Laravel 4 and the other is in Laravel 5.

This might seem to be an odd question but I've to work in this way.

I've integrated both Laravel 4 and Laravel 5 project. But the problem is how to use Auth::check() method to check the user logged in Laravel 4 project from with in the Laravel 5 Project and access her data of User table???

via Chebli Mohamed