/usr/include/ags/server/security/ is in libags-dev 1.4.24-1ubuntu2.
This file is owned by root:root, with mode 0o755.
..
/usr/include/ags/server/security/ags_authentication.h
/usr/include/ags/server/security/ags_authentication_manager.h
/usr/include/ags/server/security/ags_business_group.h
/usr/include/ags/server/security/ags_certificate.h
/usr/include/ags/server/security/ags_certificate_manager.h
/usr/include/ags/server/security/ags_password_store.h
/usr/include/ags/server/security/ags_password_store_manager.h
/usr/include/ags/server/security/ags_security_context.h
/usr/include/ags/server/security/ags_xml_authentication.h
/usr/include/ags/server/security/ags_xml_certificate.h
/usr/include/ags/server/security/ags_xml_password_store.h