I tried to use the getApiAccount API but it doesn’t work.
Any battleTag you use will get a 401 Unauthorized response.
All character profile pages on the official Diablo3 home page are also redirected to the error page with a 302 error.
I think it’s because of the “#” of battleTag contained in the API URL.
If you send a test request from the link below, the address after “#” is lost.
(documentation/diablo-3/community-apis)
Check please 
test region: kr, locale: ko_kr, battleTag: hyun#3663