What is WITH when creating a user in Postgres?

Question

PostgreSQL

What is WITH when creating a user?
What is the difference
CREATE USER username WITH PASSWORD 'password';
and
CREATE USER username PASSWORD 'password';
?

Answer 1

Garbage keyword for compatibility with the standard.
It does nothing, does nothing.
If you know how to read grammar: https://github.com/postgres/postgres/blob/REL_10_S... opt_with just below, no action already at the parser stage, what it is, what it is not.