The error message you're encountering, "Violation of uniqueness constrain," suggests there may be some conflict or issue related to the unique identifier of the user(s) you're trying to delete.
Please check the following and see if it helps.
Check User Identifier: Ensure the user identifier you are using is correct. Check if there's a mismatch in the case or spelling.
Check Duplicate Users: Check to see if there are duplicate users in your system.
Check User Dependencies: Before deleting a user, make sure the user doesn't own any resources or isn't part of any task. If a user owns an app, stream, or a task, it might prevent the deletion
