public function user_hapus()
 {
     if (akses::aksesLogin() == TRUE or akses::aksesUser() == TRUE) {
         $id = $this->encrypt->decode_url($_GET['id']);
         crud::delete('tbl_user', 'username', $id);
         $this->session->set_flashdata('pengaturan', '<div class="alert alert-success">Username : <b>' . $id . '</b>, berhasil dihapus !!</div>');
         redirect('page=pengaturan&act=user_list');
     } else {
         $this->session->set_flashdata('login', '<div class="alert alert-danger">Maaf, anda session habis. Silahkan login ulang.</div>');
         redirect(site_url());
     }
 }