code: def test_read_user(
      worker, root_client, do_client, ds_client, guest_client
  ):
      for client in [ds_client, guest_client]:
          assert not manually_call_service(
              worker, client, "user.get_all"
          )
  
      for client in [do_client, root_client]:
          assert manually_call_service(worker, client, "user.get_all")
  
imports: from faker import Faker
  import pytest
  import syft
  from syft import SyftError
  from syft import SyftSuccess
  from syft.client.api import SyftAPICall
  from syft.client.domain_client import DomainClient
  from syft.node.node import get_default_root_email
  from syft.node.worker import Worker
  from syft.service.context import AuthedServiceContext
  from syft.service.user.user import ServiceRole
  from syft.service.user.user import UserCreate
  from syft.service.user.user import UserUpdate
  from syft.service.user.user import UserView
label_desc: Use image node_id 8 for calling a global function with example usage: test_read_user(worker, root_client, do_client, ds_client, guest_client) without return types