Rest API to create notebook under specific user?

Is there a JupyterHub REST API to create a notebook.ipynb file under specific user. Please advise.

It doesn’t =/

JupyterHub use Spawners that create the user environment (a docker container, a kubernetes pod, a local process, etc), and creating a notebook would depend on the user environment’s storage, so such REST API if attempted to be implemented by JupyterHub, would require support among all kinds of spawned environments. That makes having such feature a very advanced feature that would be hard to implement and maintain.