INTERNAL: TBD in tutorial

❗️

Blockers

1. Move code to nice clean repo & change directory name to before/after.
   Then update all references, links/snippets

🚧

To consider

1. Context:
   We need a more detailed context explanation - you focused on the creation process which is great but the why is not clear - you are talking about the choose for the first time here and im not sure the reader will understand why.

2. When adding the choose function - either add more detailed comments in the code around the json object details or explain what it is structured of.

3. what do you think about handling errors here as well - what happens when the key is wrong and the error message you will get - you mention it as if all is well this is what you get but maybe we can show an example on what happens if you had an error.