SUSPEND/UNSUSPEND USERS command
See the following article for more information:
The SUSPEND USERS command allows you to ensure that specified users cannot log in to Crunch. The UNSUSPEND USERS command allows you to reactivate suspended users.
A suspended user will still remain listed as a user in your Crunch account, but the user will not be able to access any data in Crunch. A user can be unsuspended and regain access to all data they previously had access to. See the help article for more information.
SUSPEND USERS emails_list;
UNSUSPEND USERS emails_list;
Example
SUSPEND USERS "Elizabeth Davis <elizabeth.davis@example.com>, Linda Williams <linda.williams@example.com>";
UNSUSPEND USERS "Elizabeth Davis <elizabeth.davis@example.com>, Linda Williams <linda.williams@example.com>";