How can I select only certain parts of the array?

I copied your code verbatim but worth noting that

"Authorization": "oauth:key",

In API calls, it’s

For Kraken

    "Accept": "application/vnd.twitchtv.v5+json",
    "Authorization": "OAuth YourKey",
    "Client-ID": "client-id"

For helix (different pre word and no v5 header)

    "Authorization": "Bearer YourKey",
    "Client-ID": "client-id"

And I’m not sure if oauth:key is a placeholder or actually what you wrote