Hey there @antonio.zaccardi!
Terribly sorry for the delay in response! I got trapped in the huge number of incoming questions and simply forgot about that one. Never mind getting back to the core issue.
In the meantime, if you haven’t got past your struggle we figured out a process to handle that most effectively which is simply by raising the GitHub issue in this situation in this repo:
https://github.com/auth0-samples/auth0-ios-swift-sample/tree/master/00-Login
and providing as much context around your struggle as possible which is simply copy pasting what you provided here. The key is that you will be able to work with tool maintainers directly which is most effective. Here’s more on that: