[dancer-users] how to make sure one db connection per user

Hi, I use Dancer::Plugin::Database in my application. Each time when $dbh = DBI->connect( $c->{ dsn }, $c->{ username }, $c->{ password}, $c->{ dbi_params }) is called. does it return a new connection? I would like one db connection for each user, where can I save the database handler? I try to save in session, but it doesn't work. Is session can only save string, but not object? Many thanks, Dan