You should take a look at the support page for Security Assist and have a look at the getting started guide, solution recipes, and how to's to get a better idea of how the tool works for this type of thing.
securityassist/
In the SecurityAssist Authenticate User server behavior on the login page you can configure session variables to be set on the final step. In this final step of the server behavior you can add a session variable for any columns in your users table. This can be very useful if you want to store the userid, username, or email address in a session variable, then you can use these values on any page you want.