How to fully control local authentication

I enabled localAuthentication and authenticationCallback in confd.conf, For some cases that I need control the user login more flexibly: for example, if an user “test” attempt to login with a wrong password as per local aaa configuration, and in such scenario I still want to do some other check and let it pass. Is it possible to implement this behavior to do something in the registered authentication callback function?

int OcComponent::auth_cb(struct confd_auth_ctx *actx)
    int ret = CONFD_OK;

// Here I want to fully control the user login with specified logic

    return ret;

Thanks a lot.

See Chapter “External Authentication” in the ConfD UG and the “examples.confd/ext-auth/ext-authentication” example.