APM httpagent401 in clientless mode?

ok - thanks - just a minor problem still - see - I am used to use the APM module for authentication etc - this irule here is probably fired under the LTM module - after the APM - or can I use this in a irule I get trigged from the apm module somehow? I can see that I under general purpose in the VE has acccess to an irule event where I get the option of a Custom irule event agent with an ID? - do create this irule here and then bind it somehow to this event and I can then afterwards get access to the "session.logon.last.username and password" here?

best regards /ti