You can independently end your Legartis trial and delete your account. You will receive a confirmation, in a popup window.
You can find the "Delete Workspace" button in your personal User Settings on the General tab.
This will close your workspace, remove and log out all users, cancel your subscription, and delete all data. No one can log in again afterward, and you cannot undo it yourself.
Please note that you need the "Packages & Billing" permission to see the Danger Zone.
This functionality is not accessible to users of the Enterprise package!