I’m working on a product where you can enable an upload user (or uploaduser?) which is a special user that has upload privileges. (i.e. download from one of the other sites, or via an existing internet site), but now the software is not supported by it..

I am not a native English speaker. I understand English as one word or two. (I know the German word but the Dutch word is English) In my native language it would be one word.

I found this article where I learn that compound words in english can actually be two words (open compounds): https://www.grammarly.org/. Both

“superuser” and “uploaduser” are analogues, so since “computer’s a secret word”, I feel like they is written in one word, but why they are used? Of course superuser is more common and has had time to be adopted into becoming a closed compound? If I want to ask whether to apply “user” or “upload user” privileges to a user, when it is being “expected” it

is annoying inconsistency if i want to ask whether “user” should ask how to run the application.