Deleting a user in GWMCE is impossible, an error is thrown when you try to delete a user:

An Error Has Occurred
The attempted response is below
<br />
<b>Fatal error</b>: Uncaught exception 'ADODB_Exception' with message 'mysql error: [1146: Table 'guava.roles_defaultdashboards' doesn't exist] in EXECUTE("SELECT name FROM guava_roles WHERE role_id IN (select role_id from roles_defaultdashboards where dashboard_id IN (select id from dashboard where uid=11))")
' in /usr/local/groundwork/guava/adodb/adodb-exceptions.inc.php:78
Stack trace:
#0 /usr/local/groundwork/guava/adodb/adodb.inc.php(886): adodb_throw('mysql', 'EXECUTE', 1146, 'Table 'guava.ro...', 'SELECT name FRO...', false, Object(ADODB_mysql))
#1 /usr/local/groundwork/guava/adodb/adodb.inc.php(861): ADOConnection->_Execute('SELECT name FRO...', false)
#2 /usr/local/groundwork/guava/packages/guava/support/usermanagement.inc.php(313): ADOConnection->Execute('SELECT name FRO...')
#3 /usr/local/groundwork/guava/includes/button.inc.php(154): GuavaUserManagement->deleteUserHandler(Object(Button))
#4 /usr/local/groundwork/guava/includes/button.inc.php(128): Button->Invoke()
#5 /usr/local/groundwork/guava/includes/guava.inc.php in <b>/usr/local/groundwork/guava/adodb/adodb-exceptions.inc.php</b> on line <b>78</b><br />


Tables in database guava:

mysql> use guava
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Database changed
mysql> show tables;
+-------------------------+
| Tables_in_guava |
+-------------------------+
| guava_group_assignments |
| guava_groups |
| guava_packages |
| guava_preferences |
| guava_qolt |
| guava_role_assignments |
| guava_roles |
| guava_roleviews |
| guava_schema |
| guava_sysmodules |
| guava_theme_modules |
| guava_themes |
| guava_users |
| guava_views |
+-------------------------+
14 rows in set (0.00 sec)