Upgrading DocuSign to OAuth Authentication
DocuSign API calls using legacy username/password authentication will fail worldwide from March 2023
To continue calling DocuSign APIs after this date, you must login to your DocuSign account as an administrator and make changes to enable OAuth in your Integration Apps. You must then grant one-time consent to allow ongoing OAuth authentication for your DocuSign API user. You can continue to use your existing API user once you grant this consent to them.