public function store(Request $request)
{
// ['title', 'class', 'semester', 'questions', 'active'];
$survey = Survey::create(['title' => $request->input('title'), 'class' => $request->input('class'), 'semester' => $request->input('semester'), 'questions' => $request->input('questions'), 'active' => false]);
return response()->json($survey);
}