capture value "Injected into Authentication Header"

Hi,
I've to capture the value send to webserver using an Identity Injection policy with "Inject into Authentication Header" action.

With /etc/laglogs.conf set with this value:
LOG_LEVEL=7
DEBUG_HTTP_HEADERS=1
DEBUG_SOAP_MESSAGES=0

I can see in /var/log/laghttpheaders the value about Identity Injection policy with "Inject into Custom Header" action, but not with "Inject into Authentication Header" action.

Do you know I can capture this info?

Thanks in advance.

Cheers
Maurizio