<nav class="navbar navbar-expand-lg navbar-dark bg-primary">
    <a class="navbar-brand" href="#">Navbar</a>
    <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarColor02" aria-controls="navbarColor02" aria-expanded="false" aria-label="Toggle navigation">
        <span class="navbar-toggler-icon"></span>
    </button>

    <div class="collapse navbar-collapse" id="navbarColor02">
        <ul class="navbar-nav mr-auto">
            <li class="nav-item">
                <a class="nav-link" href="">Home</a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="<?= URL .'controller-users/index'; ?>">Listar</a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="<?= URL .'controller-users/inserir'; ?>">Inserir</a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="#">Sobre</a>
            </li>
        </ul>
        <span class="navbar-text">
            <?php echo "Usuário: {$_SESSION['nome']}"; ?>
        </span>
        <span class="navbar-text">
            <a class="nav-link" href="<?= URL .'controller-auth/logout'; ?>">Sair</a>
        </span>
    </div>
</nav>