Automated way to add and remove session hosts to pools

[Deleted]

HI All,

I'm looking for an automated way (well, the best way) to add and remove sessions hosts from AVD pools. I was looking at the rest API (which we already us a lot) but don't see any endpoint making this possibe via the rest API. Would there be a way via powershell or ARM maybe to do this ? 
We want to achieve this to do monthly replacement off session hosts (first add 10, then remove the "old 10 for example) and for quickly scaling out. 
Please share your suggestions/solutions if you can... thanks.