With this Marriott breach, there's already a bunch of phishing attempts to screw over a second time.
Be wary of any email you get claiming to be from Marriott. Treat it with full skepticism, even if it looks legitimate. And don't click on any links in them until you're 175% sure it's legitimate.
@0x56 don't click on email links, period.
At worst, copy into a text only editor, review URL, then copy back out of text only editor