# File lib/fog/identity/openstack/v3/requests/update_os_credential.rb, line 6
          def update_os_credential(id, credential)
            request(
              :expects => [200],
              :method  => 'PATCH',
              :path    => "credentials/#{id}",
              :body    => Fog::JSON.encode(:credential => credential)
            )
          end