public function getUnsubscribe()
 {
     if (!\Input::has('e')) {
         return redirect('/')->with('flashMessage', ['class' => 'danger', 'message' => 'No inputs, cannot unsubscribe.']);
     }
     try {
         \NewsLetter::remove(trim(\Input::get('e')));
         return redirect('/')->with('flashMessage', ['class' => 'success', 'message' => 'successfully unsubscribe.']);
     } catch (\Exception $e) {
         return redirect('/')->with('flashMessage', ['class' => 'danger', 'message' => $e->getMessage()]);
     }
 }