You can’t: SmartThings no longer provides a free groovy cloud in which to run custom device type handlers.
Instead, both stock and custom edge drivers (which are written in the programming language LUA), run on your own hub. Once you find an author who has one that you want, the author gives you a link that you click on, and there you can subscribe to their “channel“ and download the desired custom edge driver to your own hub. It’s just a completely different process now.
I already gave you this link in response to one of your other recent posts, but for anyone else following along, start with the community FAQ on the new architecture, and it will explain both how to find custom edge drivers and how to subscribe to them:
FAQ: I have no idea what Edge is. Is that a new developer tool? (2022)
Since it sounds like from your first post in this thread, you did already find an edge driver, it may be that it just doesn’t have the specific “fingerprint“ of the device you own. Again, the best thing would be to ask in the author thread where the link for that edge driver exists. In this case: