'Returns a Organization object for the login name
:param str username: (required), login name of the org
:returns: :class:`Organization <github3.orgs.Organization>`'

def organization(self, username):

    url = self._build_url(u'orgs', username)
    json = self._json(self._get(url), 200)
    return self._instance_or_null(Organization, json)
