# File lib/fog/identity/openstack/v2/requests/list_users.rb, line 6
          def list_users(options = {})
            if options.kind_of?(Hash)
              tenant_id = options.delete(:tenant_id)
              query = options
            else
              Fog::Logger.deprecation('Calling OpenStack[:identity].list_users(tenant_id) is deprecated, use .list_users(:tenant_id => value)')
              tenant_id = options
              query = {}
            end

            path = tenant_id ? "tenants/#{tenant_id}/users" : 'users'
            request(
              :expects => [200, 204],
              :method  => 'GET',
              :path    => path,
              :query   => query
            )
          end