CREATE USER compatibility for unixsocket plugin (IDENTIFIED WITH vs IDENTIFIED via)

New version of MariaDB supports mapping OS users to DB users, that is a great new feature!

MySQL had it before, and uses a slightly different syntax:

ALTER USER sst@localhost IDENTIFIED WITH auth_socket AS 'mysql';

It would be nice if MariaDB supports the same syntax, this makes automation easier to implement.

So, auth_socket should map to unixsocket plugin,
and IDENTIFED WITH should be implemented the same way as IDENTIFIED WITH

Thank you