this one is working good: we can request POST with request body- create sender to design template by using the API: https://demo.docusign.net/restapi/v2.1/accounts/{accountId}/envelopes/{envelopeId}/views/sender
but this one is not working we can request DELETE with no request body to same above api - to revoke url used for sender but its reponse is 404
check this docusign documentation https://developers.docusign.com/docs/esign-rest-api/reference/Envelopes/EnvelopeViews/createSender/
we can revoke the Url by making a delete call to the Same API(used to create sender).