public function random(Module $module, $name){
    // Get all questions for module.

    $questions = $module->questions->shuffle()->pluck('id');

    // Get unseenQuestions

    $sessionName = 'unseenQuestions_' . $name .  strval($module->id); //unseenQuestions_all_2

    if (session()->has($sessionName)) {
        $unseenQuestions = session()->get($sessionName);

    } else {
        $unseenQuestions = collect($questions);

    }

    // Pop new Question

    $newQuestionID = $unseenQuestions->shift();;

    // Store unseenQuestions OR remove unseenQuestions (if it has no items)

    if ($unseenQuestions->count() == 0) {
        session()->forget($sessionName);
    } else {
        session()->put($sessionName, $unseenQuestions);
    }

    return new QuestionResource(Question::find($newQuestionID));
}