Which file does vBulletin use to create sessions?

[rgf207]

I am working on a script that will integrate vBulletin with my website so they use the same user database and can keep sessesions between them.

Can someone tell me which file vBulletin uses to execute the query to insert a new session into the database.

I have seen where they start the sessions but not where it's actually entered into the database

Thanks