public function getReadme($username = null, $password = null)
	{
		if($this->_readme == null && $this) {
			$config = [];
			if($username && $password) {
				$config['request.options'] = array(
					'auth' => [$username, $password, 'Basic']
				);
			}
			$client = new Client(sprintf('https://api.github.com/repos/%s/readme', $this->name), $config);
			$this->_readme = $client->get()->send()->json();
		}

		return $this->_readme;
	}