Install worker for another CF user domain

In the past, Cloudflare Apps allowed to install workers. This ability has been AFAIK removed. What is the easiest way to setup a worker on another person behalf nowadays? An example scenario could be a worker enhancing or transforming html before reaching the client. Is there a way to make it easier than to, for example, ask user to generate CF Auth Token on their own and pass to the app so that it can edit workers? Maybe I’m missing some obvious redirection option?