Has the Create user API URL changed?

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Hi, I’m using create User API for test purpose.
I could use it without any problem until yesterday, but today I called the API, and got this error.
This occurs when using basic authentication, and not occurs when using cURL.

{"message":"Invalid URL: /rest/api/3/user","name":"TypeError"}

I know the API is state of experimental, but if possible, could you teach me if the URL has been changed ?