How can I omit in output from pg_dumpall this roles creation part:

--
-- Roles
--

CREATE ROLE admin;
ALTER ROLE admin WITH NOSUPERUSER INHERIT NOCREATEROLE CREATEDB LOGIN NOREPLICATION NOBYPASSRLS PASSWORD 'SCRAM-SHA-';
CREATE ROLE user;
ALTER ROLE user WITH NOSUPERUSER INHERIT NOCREATEROLE NOCREATEDB LOGIN NOREPLICATION NOBYPASSRLS PASSWORD 'SCRAM-SHA-';
CREATE ROLE postgres;
ALTER ROLE postgres WITH SUPERUSER INHERIT CREATEROLE CREATEDB LOGIN REPLICATION BYPASSRLS PASSWORD 'SCRAM-SHA-';
CREATE ROLE zabbix;
ALTER ROLE zabbix WITH NOSUPERUSER INHERIT NOCREATEROLE NOCREATEDB LOGIN NOREPLICATION NOBYPASSRLS PASSWORD 'SCRAM-SHA-';

Thank you for any hint.