public function channel($channel)
    {
        $channel = $this->validateChannel($channel, false);

        $url = $this->getURL('channel');

        $headers = [
            'body' => [
                'private' => $this->privateKey,
                'channel' => $channel
            ]
        ];

        $response = $this->processRequest($url, $headers, 'get');

        return $response;
    }