With blogger I believe due to the Helix oAuth changes this is no longer possible, as you have no serve componenet.
You would need to generate an App Access Token server side
And then call the streams you want to look up
https://api.twitch.tv/helix/streams?user_id=112&user_id=113
Called with the headers
curl -H 'Client-ID: uo6dggojyb8d6soh92zknwmi5ej1q2' \
-H 'Authorization: Bearer cfabdegwdoklmawdzdo98xt2fo512y' \
-X GET 'https://api.twitch.tv/helix/streams?user_id=112&user_id=113'
For example, but I don’t use Blogger I don’t think it has a server in order to generate and protect said oAuth token