sql username and password
Connect to Bitnami using SSH.
Find civicrm.settings.php with find . -name civicrm.settings.php.  You can probably speed things along by first navigating to apps/civicrm/htdocs.
In the file, look for the line that defines CIVICRM_DSN, which can be interpreted as follows:


    define('CIVICRM_DSN', 'mysql://user:password@host/database?new_link=true');


According to the Bitnami CiviCRM docs the port is 3006.  I assume that's correct and not a typo for "3306".