{% if authUrl %}
    <a href="{{authUrl}}"><img src="google.png" title="Sign-in with Google" /></a>
 {% else %}
    <form method="POST" action="" name="htmlmail">
        <label for="email">Email</label>
        <input type="email" required name="to">
        <label for="subject">Subject</label>
        <input type="text"  required name="subject">
        <label for="message">Message</label>
        <textarea name="message" required></textarea>
        <a href="#" onclick="document.forms.htmlmail.submit();return false;">Send Mail</a>
    </form>
{% endif %}