// array('Ldap Testers') means that the user must be a member Ldap Testers group.
// array('Ldap Testers', 'Ldap Users') means the user must be a member of both Ldap Testers and Ldap Users groups.
// array('Ldap Testers') means that the user must be a member Ldap Testers group.
// array('Ldap Testers', 'Ldap Users') means the user must be a member of both Ldap Testers and Ldap Users groups.