Customising the Customer Return Order Page

When my customers are sent an email notifying them that their order has been confirmed, the link takes them to my site, but the text "Please login first" is shown.

How do I customise that page to show the login module from my site? I know that it uses the default template "hikashop.php", but is there a way - within Joomla or HikaShop - to add the Login module?

Thanks in advance,

Pabs