Interesting, I thought that wasn't possible, but now I feel like I'm just confused and mixing it up with something else that wasn't possible but can't remember

Interesting, I thought that wasn't possible, but now I feel like I'm just confused and mixing it up with something else that wasn't possible but can't remember well enough. But anyway, what I want from TS is type UserId = unique string; // or something const userId = "1234" as UserId and no further boilerplate or trickery to get it to work. Would certainly be nice.