public function allow($project_id)
{
$key = Visitor::where("project_id", $project_id)->get()->first();
try {
if ($key == null) {
$key = static::random(15);
Visitor::create(["project_id" => $project_id, "Key" => $key]);
}
} catch (\Illuminate\Database\QueryException $e) {
}
return redirect()->action("VisitorController@show", [$project_id]);
}
