# File lib/fog/identity/openstack/v2/requests/list_tenants.rb, line 6
          def list_tenants(options = nil, marker = nil)
            if options.kind_of?(Hash)
              params = options
            else
              Fog::Logger.deprecation('Calling OpenStack[:identity].list_tenants(limit, marker) is deprecated, use'\
                                      ' .list_ec2_credentials(:limit => value, :marker => value)')
              params = {}
              params['limit'] = options if options
              params['marker'] = marker if marker
            end

            request(
              :expects => [200, 204],
              :method  => 'GET',
              :path    => "tenants",
              :query   => params
            )
          end