How to setup phpMyAdmin to use cookie authentication

This guide will describe how to setup phpMyAdmin to use a cookie based login system.
The advantage of the cookie based logins is that you can get an exact mysql error as to why you can't login (if you can't login).

Edit:
/var/www/html/phpMyAdmin/config.inc.php

Change:

$cfg['blowfish_secret'] = '';

$cfg['blowfish_secret'] = 'anyrandomtextyouwant';

$cfg['Servers'][$i]['auth_type']     = 'http';    // Authentication method (config, http or cookie based)?

$cfg['Servers'][$i]['auth_type']     = 'cookie';    // Authentication method (config, http or cookie based)?