public function store(SamplingsiteRequest $request)
 {
     $date = Carbon::now();
     $sampling_site = new Samplingsite($request->all());
     if (Auth::user()->getRol() == "Gestor") {
         $sampling_site->agent_id = Auth::user()->idEntity();
     }
     $sampling_site->created_at = $date;
     $sampling_site->updated_at = $date;
     $sampling_site->save();
     return redirect()->route('sitios-muestreo.index');
 }