OpenID Connect 플러그인 리팩토링 (OIDC Implicit Flow)

[david (David Taylor)]

Thanks for this @justinm. I’ve merged the PR, and added a section to the docs:

@Discourse

For identity providers which support secret-less authorization using the “Authorization Code Flow with Proof Key for Code Exchange”, PKCE should be enabled, and the client_secret configuration can be omitted.