def get_slo_url(self):
        """
        Gets the SLO URL.

        :returns: An URL, the SLO endpoint of the IdP
        :rtype: string
        """
        url = None
        idp_data = self.__settings.get_idp_data()
        if 'singleLogoutService' in idp_data.keys() and 'url' in idp_data['singleLogoutService']:
            url = idp_data['singleLogoutService']['url']
        return url
Gets the SLO URL.

        :returns: An URL, the SLO endpoint of the IdP
        :rtype: string