BeastBB/templates/main/Index.html.ep

<h1>Welcome to BeastBB <%= defined $user ? $user->Username : 'anonymous user' %>.</h1>
% if (!defined $user) {
    <p><a href="/login">Login</a> <a href="/signup">Signup</a>
% }
% if (defined $error) {
    <p style="color: red;"><%= $error %></p>
% }