The user deletion API currently only cater for InSided community user ID.
Since the authentication of SSO is mapping to our own internal ID, deletion using the API would not work.
https://api2-us-west-2.insided.com/docs/user/#operation/erase
https://api2-us-west-2.insided.com/user/{id}/erase
Suggesting to have an API, https://api2-us-west-2.insided.com/user/{oauth2_sso_id}/erase
this would benefit all InSided clients that are using oauth2 authentication