function showRandomUser() {
    fetch("/random_user")
        .then(response => response.json())
        .then(data => {
            const display = document.getElementById("random-user-display");
            if (data.error) {
                display.innerHTML = `<p style="color:red;">${data.error}</p>`;
            } else {
                display.innerHTML = `
                    <div class="random-user-card">
                        <img src="https://api.dicebear.com/8.x/initials/svg?seed=${data.name}" class="avatar">
                        <strong>${data.name}</strong><br>
                        <small>Pridané: ${data.created_at}</small>
                    </div>`;
            }
        });
}