header.html
<nav>
<a href="index.html">Index</a>
<a href="slow-games.html">Slow games corner</a>
{{#if common_auth_info}}
{{#if common_auth_info.user}}
Hello, <a href="my.html">{{ common_auth_info.user }}</a>
<form id="logout" action="logout.do" method="post"><input name="submit" type="submit" value="Log Out"></form>
{{else}}
<a href="login.html">Log In</a>
{{/if}}
{{/if}}
</nav>