final protected function get($resource, array $fields = null)
    {
        // Initilize the request as post
        $this->init('get', $resource);

        // If exists query fields, append it
        if (is_array($fields)) {
            $query = $this->request->getQuery();
            foreach ($fields as $param => $value) {
                $query->set($param, $value);
            }
        }

        // Make the request using guzzle
        return $this->call();
    }