Currently user can be only disabled through API. however there is no way to delete users from the portal no matter if they are disabled or enabled.
Please add Delete option in the api for the user object.
|Release time frame|
Thank you for the note. At this time, we do not provide the ability to delete ideas portal users via the API or the application, as this would result in a loss of data.
At this time, we would suggest using the disable capability for a similar outcome (without the loss of data)