/**
  * Store a newly created resource in storage.
  *
  * @param  \Illuminate\Http\Request  $request
  * @return \Illuminate\Http\Response
  */
 public function store(Request $request)
 {
     $date = Carbon::createFromDate($request->year, $request->month, 1);
     $date->hour = 0;
     $date->minute = 0;
     $date->second = 0;
     $salary_sheet = SalarySheet::firstOrCreate(['date' => $date]);
     return redirect('/hr/salary_sheet/' . $salary_sheet->id);
 }