How to open an isolated margin account

How to open an isolated margin account
I tried the “POST /sapi/v1/margin/isolated/account” rest api, but it doesn’t work

What’s the error message that you get?
The isolated margin account can be opened on the UI side or Binance API Documentation

I want to find a api for opens isolated margin account [ADAUSDT] , such as: /sapi/v1/margin/isolated/xxxx, but not found

{“code”:-11001,“msg”:“Isolated margin account does not exist.”}
https://binance-docs.github.io/apidocs/spot/en/#enable-isolated-margin-account-trade