I'm working on my first DocuSign web service consumer, in the development environment. At this point, I'm just trying to duplicate the token request procedure on DocuSign's how-to page: https://developers.docusign.com/platform/auth/jwt/jwt-get-token/ I'm sticking as closely as possible to the process shown in their YouTube video. I have created an app with an integration key and an RSA key pair (generated by DocuSign). I obtained application consent as per step 1 of the how-to.
As per step 2 of the how-to page, I entered the following request in jwt.io:
Header: {"typ":"JWT","alg":"RS256"}
Payload: {"iss":"(integration key GUID)","sub":"(API username GUID)","iat":1619972504,"exp":1619975504,"aud":"account-d.docusign.com","scope":"signature"}
I pasted the public and private keys, including the starting and ending strings, into the appropriate fields, and jwt.io created and verified a signature.
As per step 3 and the YouTube video, in Postman, I created a POST request to https://account-d.docusign.com/oauth/token with grant_type=urn:ietf:params:oauth:grant-type:jwt-bearer assertion=(encoded token copied from jwt.io)
No matter what I do, the web service always returns { "error": "invalid_grant", "error_description": "unsupported_grant_type" }
I've spent more time than I care to admit re-reading the how-to page, re-watching the YouTube video therein, and poring over my data for typos, etc.
Ideas, anyone? Thanks!
