Connecting via password to a Gel instance will default the user to `edgedb`

[scotttrinh]

See

gel-cli/src/options.rs

Line 1045 in b782560

&cfg.user.unwrap_or("edgedb".to_string()),

This should be server version dependent I think? Not sure if we can know this ahead of time, but either way, this is confusing given that the new default is "admin" not "edgedb".