Unassign Tag from User

Remove an access tag from the currently authenticated user.

Endpoint

DELETE /api/access-tag/assign

{
  "title": "Premium Member",
  "AuthorId": 12345
}

Field	Type	Required	Description
`title`	string	Yes	The tag name to remove.
`AuthorId`	integer	No	The user ID of the tag creator. Used to scope the tag lookup.

{
  "success": true,
  "message": "Tag unassigned successfully"
}

If the tag does not exist:

{
  "success": true,
  "message": "Tag not found or already unassigned"
}

The tag is removed from the currently authenticated user only.
If the tag does not exist or is already unassigned, the request succeeds silently.
To replace all tags on another user (admin), use the Add/Edit User endpoint with AccessTagIds: [].