User passed from HikariConfig becomes null

Hi,

We're using the MariaDB driver with HikariCp. Unfortunately, we can't set "user" parameter using the HikariConfig object.

When the pool initializes, we get this exception :

org.mariadb.jdbc.internal.util.dao.QueryException: Could not connect: Access denied for user ''@'localhost' (using password: NO)

After some debugging, it appears that the value is correctly set in the UrlParser object but is lost when "parseInternal" is called. The other params seems to be set later by Hikari so the only one missing is "user".

I've attached a test case to the issue.

Thanks.