public String failureOpenIdConfig() {
        return failureOpenIdConfig;
    }
Return the (potentially null) OpenID Connect configuration to be reported
with the failure

@return the (potentially null) OpenID Connect configuration to be reported
        with the failure
clients/src/main/java/org/apache/kafka/common/security/oauthbearer/internals/unsecured/OAuthBearerValidationResult.java