$self->session_config(
          SESSION_NAME => 'SESSION_ID1',
          COOKIE_PARAMS       => {
                                   -path  => '/',
                                 },
          SEND_COOKIE         => 1,
 );
$self->session->param('user' => 'Barney');

 $self->session_config(
          SESSION_NAME => 'SESSION_ID2',
          COOKIE_PARAMS       => {
                                   -path  => '/',
                                 },
          SEND_COOKIE         => 1,
 );
$self->session->param('user' => 'Fred');

##</code><code>##

$self->session_config(
          SESSION_NAME => 'SESSION_ID1',
);
my $user = $self->session->param('user');
$self->session_config(
          SESSION_NAME => 'SESSION_ID2',
);
my $user = $self->session->param('user');