Log level for kerberos errros

[doranych]

Is semi-question semi-issue.

We have nginx installation with spengo module.
With this configuration

location ~ /autologin\.php {
      include php_fpm_params;
      include kerberos_params;
}

kerberos_params content:

auth_gss on;
auth_gss_realm DOMAIN.COM;
auth_gss_force_realm on; 
auth_gss_keytab /etc/my_server_cert.keytab;

I added to autologin location error_log configuration.

error_log /var/log/nginx/error_spnego.log info

But there is no any messages in log.

I've done some reseearch and found, that you use spnego_log_error function to log authenication errors.

All this things together makes me very confused. I see, that you write error log level messages, but i can't find them in log file.

It write a lot of things, that i don't need, when I set debug log level.

I have abotu 300rps to this location, so debug level is unacceptable.

Our config:
centos 7
nginx 1.16

I can provide any source of config if need, but masked for NDA