Setting a user's device login credentials through API

I am curious if anyone has done this or knows whether it is possible. I have a customer that needs to rotate the windows device password for the unattended bot runner account every 30 days. They would like to set it up to run through the API, being called either from their DevOps pipeline or a script (PostMan, PS, whatever works).

I have been looking through the swagger examples under User, but cannot seem to get the syntax correct, and am having trouble with the dearth of documentation. If anyone has an example, that would be much appreciated.