In the process of trying to learn Magento I reset the cookie domain in System > Configuration > General > Web according to this article:
It appears I entered a bad value (.www.domainname.com) and can now not get into the admin panel. I am trying to support a client who has a Magento staging site on an AWS Bitnami Lightsail instance. But the client seems to have locked down PHPMYADMIN and remote connections to the MySQL database.
SO, is there any way to reset the cookie domain for this staging site WITHOUT access to the database?