Can I call errorHandler.setUser() before errorHandler.start()?

[ZYinMD]

const errorHandler = new StackdriverErrorReporter();
errorHandler.setUser('some_user_id');
errorHandler.start({ ...config, service: 'some_service_name' });

README says setUser can be called "at any time", but I just want to confirm, can I call it before start()?

In my code, I call setUser() when user id becomes available, and call start() when service name becomes available, and I can't guarantee their order.

Thanks!