how to retrieve session in laravel 5.6?

edit function

 public function editNotice(Request $request,$id=null){
   if(Session::has('idSession')){
         if($request->isMethod('post')){

            $data = $request->all();
            $test = $data['death_name'];
            Session::put('death_name',$test);


    } else {
      return redirect('/user')->with('flash_message_error','Please Login First to access..');
    }
}

verifyEditNotice function

public function verifyEditNotice(Request $request,$id=null){

    $new = Session::get('death_name');
      echo $new;die;
 }

here, i have saved death name in session in edit function and i want to retieve the session value in verify edit function. but the problem is when I retrieve it shows null. How do i get the value in another function..

via Chebli Mohamed