onError method
Called when an exception was occurred during the request.
Implementation
@override
void onError(DioException err, ErrorInterceptorHandler handler) {
if (Constants.enableDebugLog) {
print("");
print("--------------- error ---------------");
print(err.toString());
print(err.response.toString());
print("------------- error end ------------");
print("");
}
super.onError(err, handler);
}