There appears to be different answers around if character ids are unique or not.
This says that character ids are not unique and need to be evaluated with a playfab id
https://api.playfab.com/documentation/server/method/GetAllUsersCharacters
This thread https://community.playfab.com/answers/18242/view.html seems to say that character ids are unique. It also seems like the Entity API would require unique character ids as well.
Ultimately what I would like to do is to be able to find the associated playfab player id that belongs to a character id.
The suggestion in this thread seems like a bit of a hack. Anyway to do it with the Entity API?
https://community.playfab.com/questions/13204/how-can-i-find-player-with-character-id.html