Checking if user is loggedin in eZpublish template

loggedin.tpl

{if is_set($current_user)|not}{def $current_user=fetch( 'user', 'current_user' )}{/if}                                                                              

{if $current_user.is_logged_in}
    {* Show content for logged in users *}
{else}
    {* Show content for anon users *}
{/if}