public function index(Request $request)
 {
     $start_time = $request->get('start') ? date("Y-m-d", strtotime($request->get('start') . " -1 day")) : date("Y-m-d", strtotime("-1 month -1 day"));
     $end_time = $request->get('end') ? date("Y-m-d", strtotime($request->get('end') . " +1 day")) : date("Y-m-d", strtotime("+1 day"));
     if (Auth::user()->role == "supadmin") {
         $company_id = $request->get('company_id');
     } else {
         $company_id = $this->company_id[0];
     }
     $currency = $company_id != null ? Company::find($company_id)->currency->title : null;
     if (Auth::user()->role == "supadmin") {
         $data = Payment::users($company_id, $start_time, $end_time);
     } else {
         $data = Payment::users($this->company_id[0], $start_time, $end_time);
     }
     return view('payment.list_users')->with(['data' => $data, 'currency' => $currency, 'companies' => Company::listAll()]);
 }