protected function countThrottle($identityString, $increments = 1)
    {
        $count = app('cache')->get('login_throttling:' . md5($identityString), 0);

        $count = $count + $increments;

        $ttl = config('store.throttle_time_period');

        app('cache')->put('login_throttling:' . md5($identityString), $count, $ttl);

        return $count;
    }