Authentication in Jigsaw

Hello!

I´m a teacher at the University of Cantabria in Spain and I have just
installed Jigsaw, and due to the great amount of pupils I have it takes me a
lot of time to write all the user names and password so they can access to
the protected resources of the course I teach.

I was wondering if were possible to import with an utilitie or an available
PLUG-IN the some fields of a database and use it for that purpose.

Thanks in advance.