//functions for displaying the Delete thread page
public IActionResult Delete(int?threadId)
{
var userName = _userManager.GetUserName(User);
var thread = _service.GetById(threadId);
if (thread == null)
{
return(NotFound());
}
var creator = _service.GetChannelCreator(thread);
if (thread.UserName != userName && creator != userName)
{
return(NotFound());
}
return(View(thread));
}