public function store(Request $request)
    {
        $this->validate($request, [
            'slug'      => 'required',
            'default'   => 'required',
            'value'     => 'required',
        ]);

        $input = $request->all();

        $configuration = new Configuration();
        $configuration->create($input);

        Session::flash('configuration', 'Setting saved successfully.');
        \Cache::forget('ticketit::settings'); // refresh cached settings
        return redirect()->action('\Kordy\Ticketit\Controllers\ConfigurationsController@index');
    }