Return registration_endpoint in OidcProviderConfigurationEndpointFilter

[bibibiu2017]

Describe the bug
OpenId configuration metadata endpoint does not return registration endpoint even though dynamic client registration it was implemented in gh-189

To Reproduce
http://auth-server/.well-known/openid-configuration
returns

{
    "issuer": "http://localhost:8000/authorization",
    "authorization_endpoint": "http://localhost:8000/authorization/oauth2/authorize",
    "token_endpoint": "http://localhost:8000/authorization/oauth2/token",
    "token_endpoint_auth_methods_supported": [
        "client_secret_basic",
        "client_secret_post"
    ],
    "jwks_uri": "http://localhost:8000/authorization/oauth2/jwks",
    "response_types_supported": [
        "code"
    ],
    "grant_types_supported": [
        "authorization_code",
        "client_credentials",
        "refresh_token"
    ],
    "subject_types_supported": [
        "public"
    ],
    "id_token_signing_alg_values_supported": [
        "RS256"
    ],
    "scopes_supported": [
        "openid"
    ]
}

Expected behavior
Should contain the client registration endpoint

[sahariardev]

hi @jgrandja. Can I work on this issue?

[jgrandja]

Thanks for your interest @sahariardev.

We're holding off on adding new features and enhancements until after we release 0.3.0.

Our top priority for 0.3.0 is to deliver the initial version of the reference documentation.
We still have a lot of work to do so we need to keep focused.

Please reach out again after 0.3.0 is released May 23.

[sahariardev]

Thanks for the reply. I will reach out after 0.3.0 release.

[sahariardev]

hi @jgrandja,
Can I work on this issue?

[jgrandja]

@sahariardev Yes, the issue is yours.

Please keep in mind that OidcProviderConfigurationEndpointFilter should return the registration_endpoint ONLY if the OpenID Connect 1.0 Client Registration Endpoint is enabled - it's disabled by default.

[sahariardev]

Thanks for the reply. I will keep that in mind

[sahariardev]

Hi @jgrandja,
I have created a Draft PR for this issue. Please review and let me know your feedbacks.
Here is the PR link
#762