how to use PKCE in Application Registrie

Peter Xiang
Tera Expert

Now I am integrating ServiceNow and DocuSign, and I checked Require Proof Key for Code Exchange (PKCE) in DocuSign.

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Knowing that I checked Public Client in the Application Registries of SN, and then selected S256 of Code challenge method, but when click Get OAuth Token the authentication returns 401, I want to know what else I need to do?

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