You can always login at http://yoursite.lili.org/user^*.
* Note: You'll have to replace "yoursite" with your site's name.

If you'd like to add your login link back into your footer, do the following steps:

1. Login to your site (see note above)
2. Click Administer >> Site Configuration >> Site Information^*
   * Note: This can be accessed directly at http://yoursite.lili.org/admin/settings/site-information.
3. Copy and Paste the following code into your footer at the bottom of the text area
   <p><a href="/user">Login</a></p>
   * Note: You can change the word Login to something more fitting to your site's needs.