Error when calling DocuSign's get access token API on iOS

Question

I get error:

{
     "error": "invalid_request",
     "error_description": "code challenge and code challenge method required"
}

What do I need to do to fix this error?

I followed Docusign's instructions but the error still appears

Answer 1

That error is highlighting that you possibly have pcke enabled on your integration & not passing through a code

https://developers.docusign.com/platform/auth/authcode/authcode-get-token/#optional-pkce-code-challenge

More information available here: https://www.docusign.com/blog/developers/docusign-adds-support-pkce