def METHOD_NAME() -> Iterator[ARServer]:
    with ARServer(ars_connection_str(), timeout=30, event_mapping=event_mapping) as ws:
        test_username = "testUser"
        assert ws.call_rpc(
            rpc.u.RegisterUser.Request(get_id(), rpc.u.RegisterUser.Request.Args(test_username)),
            rpc.u.RegisterUser.Response,
        ).result
        yield ws