public function index(Request $request)
{
$start = $request->input('start', 0);
$length = $request->input('length', 5);
$draw = $request->input('draw', 1);
$operators = Operator::select('operators.id', 'operators.name', 'operators.email', 'operators.password', 'operators.created_at', 'roles.name as role_name')->join('roles', 'roles.id', '=', 'operators.role_id')->skip($start)->take($length)->orderBy('id', 'desc');
echo json_encode(array("draw" => intval($draw), "recordsTotal" => intval(Operator::count()), "recordsFiltered" => intval(Operator::count()), "data" => $operators->get()->toArray()));
}
