I am trying to not use session object anymore (have enough reasons... ;) ) and instead, I want to do it all by profile object.
How I do it?
For example in my login page, user enters username and password and I check it using my database objects and so on, if authentication is passed, I should just simply assign some value like user id into a predefined profile property?
How about expiration? Say user didnt have any activities for 30 minutes, how do I handle that?

So I sum it up here:

1-Does a profile object expire like a session object? If not, how do I simulate that to log a user out after a certain period of time...
2-Are profile objects stored in server memory or in a database or something?
3-Any sample code so that I can take a look at it and learn from?
Thanks a million in advance :)
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