public function update($id)
 {
     $venue = Venue::findOrFail($id);
     if (isset($_REQUEST['name'])) {
         $venue->name = $_REQUEST['name'];
     }
     if (isset($_REQUEST['phone'])) {
         $venue->phone = $_REQUEST['phone'];
     }
     if (isset($_REQUEST['website'])) {
         $venue->website = $_REQUEST['website'];
     }
     if (isset($_REQUEST['address'])) {
         $venue->address = $_REQUEST['address'];
     }
     if (isset($_REQUEST['zip-code'])) {
         $venue->zip_code = $_REQUEST['zip-code'];
     }
     if (isset($_REQUEST['visibility'])) {
         $venue->private = $_REQUEST['visibility'] === 0 ? 1 : null;
     }
     $venue->save();
     $_SESSION['ALERT'] = alert("Venue Update Successfully!", "", "success");
     return redirect("/venues");
 }