# (NEW!) Delete Security User Group

Permanently delete a security user group the authenticated customer owns. There is no force-delete override — mirrors role delete.

Delete Rules:
- Group must exist for the authenticated customer (or not be a channel-type group).
- Deletion is blocked when either at least one user currently has this group, or at least one security template still references it. Both conditions are checked and reported together.
- The group is not silently stripped from security templates or from users' memberships to allow the delete — the caller must resolve the blockers first.

This action is permanent and cannot be undone.

The user submitting the request must have the User Management privilege.

Endpoint: DELETE /security/user-groups/{id}
Version: 1.5
Security: ApiKeyAuth, BasicAuth

## Header parameters:

  - `X-API-Key` (string, required)
    Customer-specific API key required to invoke API.

  - `Authorization` (string, required)
    Provided by Authentication Token creation operation.

## Path parameters:

  - `id` (string, required)
    The unique ID of the group to delete.
    Example: "group-hooli-corporate"

## Response 401 fields (application/json):

  - `status` (string)
    Example: "error"

  - `message` (string)

## Response 403 fields (application/json):

  - `status` (string)
    Example: "error"

  - `message` (string)

## Response 404 fields (application/json):

  - `status` (string)
    Example: "error"

  - `message` (string)

## Response 409 fields (application/json):

  - `status` (string)
    Example: "error"

  - `message` (string)

  - `code` (string)
    Enum: "GROUP_IN_USE"

  - `details` (object)

  - `details.userCount` (integer)
    Number of users currently in this group.

  - `details.securityTemplates` (array)
    Security templates still referencing this group.

  - `details.securityTemplates.id` (string)

  - `details.securityTemplates.name` (string)


## Response 204 fields