public function addUserChannelFan($channel_id, $user_id)
    {
        if (!is_numeric($channel_id) || 0 >= $channel_id) {
            throw new InvalidArgumentException(
                "ApiException::addUserChannelFan channel_id field should be positive integer");
        }
        if (!is_numeric($user_id) || 0 >= $user_id) {
            throw new InvalidArgumentException(
                "ApiException::addUserChannelFan user_id field should be positive integer");
        }

        //@var $command Guzzle\Service\Command\AbstractCommand
        $command = $this->client->getCommand(
            'SetChannelFan',
            array('channel_id' => $channel_id, 'user_id' => $user_id)
        );

        return $this->executeCommand($command);

    }