I'm actively working on this, but cannot promise anything nor give an ETA.
There's a high chance I will need to (temporarily) remove native support for UPS and only display their website in the app, as I already sunk 3 full work days into it and didn't find a solution.
I'm also re-evaluating their API usage restrictions in hopes that I can use it, but at the very least that would require me to tunnel all UPS requests through my own server and I'm not sure how much it can handle ![indecision indecision](https://help.orrs.de/qa-plugin/wysiwyg-editor/ckeditor/plugins/smiley/images/whatchutalkingabout_smile.png)
Sorry for the inconvenience and wait!