# File lib/fog/dns/openstack/v2.rb, line 298
          def credentials
            {:provider                 => 'openstack',
             :openstack_auth_url       => @openstack_auth_uri.to_s,
             :openstack_auth_token     => @auth_token,
             :openstack_region         => @openstack_region,
             :openstack_management_url => @openstack_management_url}
          end