public function shiftsUpdate($company_id, Request $request)
 {
     $this->validate($request, ['shift_day_start' => ['regex:/[0-9]{2}:[0-9]{2}(AM|PM)/'], 'shift_night_start' => ['regex:/[0-9]{2}:[0-9]{2}(AM|PM)/']]);
     $shift = Company::find($company_id);
     $shift->shift_day_start = Common::formatTimeForSQL($request->input('shift_day_start'));
     $shift->shift_night_start = Common::formatTimeForSQL($request->input('shift_night_start'));
     $shift->save();
     return redirect('/companies/' . $company_id . '/shifts#')->with(['message' => 'Shifts time is updated successfully.']);
 }