code: def _services(lancet):
      
      def get_services(config):
          for s in config.sections():
              if config.has_option(s, 'url'):
                  if config.has_option(s, 'username'):
                      yield s
  
      for s in get_services(lancet.config):
          click.echo('{}[Logout from {}]'.format(s, lancet.config.get(s, 'url')))
docs: List all currently configured services.