Warning if 'postgres' database has been rename (e.g. DigitalOcean managed)

[Jeffry Babb]

This warning is thrown if the 'postgres' database does not exist on the server. DigitalOcean renames this database to 'defaultdb' which seems to raise this error in dango/db/backends/base/base.py

        except (Database.DatabaseError, WrappedDatabaseError):
            if cursor is not None:
                raise
            warnings.warn(
                "Normally Django will use a connection to the 'postgres' database "
                "to avoid running initialization queries against the production "
                "database when it's not needed (for example, when running tests). "
                "Django was unable to create a connection to the 'postgres' database "
                "and will use the first PostgreSQL database instead.",
                RuntimeWarning,
            )

I have searched in the LIBPQ parameters can can't find a setting that allows me to specify this name change as Django seems to have hard-coded the search for the 'postgres' db name or is looking for it in a key called 'service' around line 193 and 218 in base.py.