My job would be profesional suicider.
You could sign in to my office and have yourself open to be killed in your sleep at any time after you sign.
You could opt out of it at any time if you wanted to live or not die tonight.
How it would work would be basically, for example, filling your room with nitrogen while you sleep. Peaceful.
Or shotgun to head when asleep.
Or sword instant decapitation.
That way you'd die without ever knowing, by your own decision.
If you woke up, I'd just walk out and say you get to live tonight, don't worry. I'd get you another time.
You could also choose the type of death, peacefulnees, quickness..etc
Too bad it's illegal, but in fantasy land it's legal.
Who would sign up for it? I would.