onError method
Called when an exception was occurred during the request.
Implementation
@override
void onError(DioException err, ErrorInterceptorHandler handler) {
if (!enabled) return handler.next(err);
final js = genByJson(err.response?.data);
logPrint(
"ERR ${err.runtimeType}: ${err.requestOptions.uri.path} <<<<<<<<<<<<<\n"
"ERR-RSP $js\n");
return handler.next(err);
}