Overtrue\Socialite\Providers\AbstractProvider::hasInvalidState PHP 메소드

    protected function hasInvalidState()
    {
        if ($this->isStateless()) {
            return false;
        }
        $state = $this->request->getSession()->get('state');
        return !(strlen($state) > 0 && $this->request->get('state') === $state);
    }