my ($users) = $c->model('DB::Tech')->search_rs;
# No parens necessary or desired, it returns just a ResultSet.
my $users = $c->model('DB::Tech')->search_rs;

##</code><code>##

sub list :Chained('base') :Args(0) {
    my ( $self, $c ) = @_;
    $c->stash(template => 'admin/list.tt2');
}
# OR this is likely to work if your TT stuff is configured right-
sub list :Chained('base') :Args(0) {}

##</code><code>##

[% META title = 'System Users List' -%]

<table>
<tr><th>ID</th><th>firstname</th><th>lastname</th><th>email</th><th>phone</th><th>Management Rating</th><th>Comments</th><th>Date</th><th>Admin</th></tr>
[% FOR user IN users_rs.all -%]
        <tr>
                <td>[% user.id %]</td>
                <td>[% user.firstname | html %]</td>
                <td>[% user.lastname | html %]</td>
                <td>[% user.phone | html %]</td>
                <td>[% user.email | html %]</td>
                <td>[% user.phone | html %]</td>
                <td>[% user.managementrating | html %]</td>
                <td>[% user.managementcomments | html %]</td>
                <td>[% user.date %]</td>
                <td>[% user.ismanagement %]</td>
        </tr>
[% END -%]
</table>