Disabling a user

Access the admin module

When logged in as the admin, you will be able to access the admin module by clicking this button at the top of the page:

The admin module will by default open to the user admin section.

Disable the user

Tick the relevant box to disable the user:

After saving, the user will no longer be able to access his account. The account will also disappear from the user list, unless you enabled "Show disable users" at the top of the page.