Storing user level for the current request only

Hi all,

I am building an application which needs leve-based login. On some
requests, I have to check for users level several times, and on some
not.

What I would like is to store the userlevel the first time it is looked
up into the user table, for the current request only.

Should I use flash[:level] for example? Is flash suitable for storing
things for the current request only?

Thank you!