Using face API with an already opened cv2 image

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How do I use azure face API with an already opened cv2 image without saving it again locally or on the web?
I tried looking for it in the documentations, but couldn't find a solution.
As far as I know and could find, there are only two ways of reading an image:
1. detect_with_url : Needs an URL to read the image.
2. detect_with_stream: Needs an image path to read the image.
### This issue is for a: (mark with an `x`)
```
- [ ] bug report -> please search issues before submitting
- [ ] feature request
- [x] documentation issue or request
- [ ] regression (a behavior that used to work and stopped in a new release)
```
### Expected/desired behavior
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The face API should have a function or work-around to use an already opened image without having to save it.
### OS and Version?

Windows 10 and Raspberry Pi
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