this uh this area there are some additional topics uh that could be covered like how can we do documentation on the api design uh how can we do a testing and validation of our apis versioning security so what kind of security are there not just authorization and authentication but also rate limits uh both protection topics like that there is also caching and backend speed optimizations there is some recipes that we can use to improve our apis like that and also a lot of implementation details on how can we implement our apis