I looked into procedure get_authentication_details_for_connections, I found comments as follows.
-- Afterwards the 3rd-party service ID or WebID is mapped to an existing SQL user account by the following means:
-- - ODS online account mapping (if ODS is installed)
-- - SPARQL ACL rules mapping service ids to SQL users
Is it necessary installing the ODS package to enable VAL authentication mechanism ? or
Is it necessary to do some additional settings ?
I tried to install ODS framework package into Virtuoso 8.3 Server using conductor interface,
but I failed to install ODS framework package. I got a error.