public async Task <IActionResult> Unsubcribe(int id) { var subject = await _subjectManager.GetSubjectAsync(id); if (subject == null) { return(NotFound()); } var user = await GetCurrentUser(); await _subjectManager.UnsubcribeAsync(new ClassRoomSubject() { ClassRoomId = user.ClassRoomId, SubjectId = id }); return(Ok()); }