To suspend all accounts through db please do the following steps.
1. Find database name and database prefix from /usr/local/etc/ezlogin/ez.conf in ezeelogin gateway server.
2. Login to mysql console
3. use db_name
4. Run this query.
update dbprefix_users set status=0, priv=1;
you have to use correct db_name and dbprefix from ez.conf
To suspend only a single user, you may use the following query.
The admin privileged user would be still able to login into the web interface and suspend the users ( users>edit>Enter authorization password> save). Note that this is possible for admin privileged user and not for any other user.