Hello channel. Some blog posts (e.g.: https://authzed.com/blog/user-defined-roles) reference "authzed.write()" syntax to bulk-create relationships, e.g.: authzed.write(resource="project:oursoftware", relation="issue_creator", subject="role:project_manager#member"). Is this feature available in the self-hosted flavor of SpiceDB? Can't find it in authzed-py or other projects.