Postgrest row level security via postgres

https://postgrest.org/en/stable/how-tos/sql-user-management-using-postgres-users-and-passwords.html#sql-user-management-using-postgres-users-and-passwords

postgres=# CREATE EXTENSION IF NOT EXISTS pgjwt WITH SCHEMA ext_pgjwt;
ERROR:  extension "pgjwt" is not available
DETAIL:  Could not open extension control file "/opt/bitnami/postgresql/share/extension/pgjwt.control": No such file or directory.
HINT:  The extension must first be installed on the system where PostgreSQL is running.