Authenticator Hook for Renaming Users

Hey there,

I am currently developing a custom authenticator.
I want to keep my separate database containing the credentials in sync with JupyterHub’s database.
Luckily, the method delete_user is called whenever a user is deleted.

However, I could not find a method that is called whenever an admin renames a user.
Do you know if there is such a hook?

Thank you very much.

Best regards,
Paul