Passing through values from client_metadata in registration handler

Author: jerome3o-anthropic

src/mcp/server/auth/handlers/register.py

@@ -75,17 +75,7 @@ async def registration_handler(request: Request) -> Response:
                 client_id_issued_at=client_id_issued_at,
                 client_secret=client_secret,
                 client_secret_expires_at=client_secret_expires_at,
-                # passthrough information from the client request
-                redirect_uris=client_metadata.redirect_uris,
-                token_endpoint_auth_method=client_metadata.token_endpoint_auth_method,
-                grant_types=client_metadata.grant_types,
-                response_types=client_metadata.response_types,
-                client_name=client_metadata.client_name,
-                client_uri=client_metadata.client_uri,
-                logo_uri=client_metadata.logo_uri,
-                scope=client_metadata.scope,
-                contacts=client_metadata.contacts,
-                tos_uri=client_metadata.tos_uri,
+                **client_metadata.model_dump(exclude_unset=True),
                 policy_uri=client_metadata.policy_uri,
                 jwks_uri=client_metadata.jwks_uri,
                 jwks=client_metadata.jwks,