@Override
    public boolean validate(final WebContext context) {
        val callContext = new CallContext(context, sessionStore);
        val clientId = requestParameterResolver.resolveClientIdAndClientSecret(callContext).getLeft();
        val registeredService = OAuth20Utils.getRegisteredOAuthServiceByClientId(this.servicesManager, clientId);

        if (registeredService == null) {
            LOGGER.warn("Provided client id [{}] cannot be matched against a service definition", clientId);
            return false;
        }
        return true;
    }
This is {@link OAuth20RevocationRequestValidator}.

@author Julien Huon
@since 6.2.0
support/cas-server-support-oauth-core-api/src/main/java/org/apereo/cas/support/oauth/validator/token/OAuth20RevocationRequestValidator.java