There are a few things wrong here…
- v5 uses IDs, not names, the URL should be
.../channels/116300654for v5 channels endpoint - channels response doesn’t contain a stream, that’d be
.../streams/116300654.
You can use https://api.twitch.tv/kraken/channels/116300654 and access via data.followers in your code.
You won’t get new data every 10 seconds though, so I’d change the interval to a few minutes.