/**
  * @param $startDate
  * @param $endDate
  * @param GetVisitByPeriod $getVisitByPeriod
  * @return mixed
  */
 public function visitsByPeriod($startDate, $endDate, GetVisitByPeriod $getVisitByPeriod)
 {
     $startDate = Carbon::createFromFormat('Y-m-d', $startDate);
     $endDate = Carbon::createFromFormat('Y-m-d', $endDate);
     return $getVisitByPeriod->csv($startDate, $endDate);
 }