systemdspawner

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Any Spawner working against JupyterHub 1.4.1 and later can now optionally implement use of a delete_forever function.

If implemented, the spawner can do cleanup work associated with a JupyterHub admin pressing the Delete button on a specific user. This has been implemented in KubeSpawner for example, see https://github.com/jupyterhub/kubespawner/pull/475. The logic to support such function was added in https://github.com/jupyterhub/jupyterhub/pull/3337.

Perhaps systemdspawner could provide such function, that also is influenced by additional systemdspawner specific options to decide if a user should be deleted, the home directory should be deleted, and perhaps also something else I've missed? I figure we can make this function default to not doing cleanup if we want to avoid a breaking change, which would make this entirely opt-in.

Would this be possible?

That sounds like a useful addition.