Get Session Time Left in laravel

I am using laravel 5.6 and i use redis for my session driver:

.env:

SESSION_DRIVER=redis

Now in my web.php:

<?php
use Illuminate\Support\Facades\Session; 
Route::get('/',function(){
    if(Session::has('a')){
        return Session::all();
    }
    Session::put('a','test',10);
    return 'reload';
});

Now i want to get my session time life with other url.But i couldn't find any command to get it!

via Chebli Mohamed