public function create($owner, $repo, $title, $key)
	{
		// Build the request path.
		$path = '/repos/' . $owner . '/' . $repo . '/keys';

		$data = array(
			'title' => $title,
			'key'   => $key
		);

		return $this->processResponse(
			$this->client->post($this->fetchUrl($path), json_encode($data)),
			201
		);
	}