Is it possible to get the transcripts for all the videos of a youtube channel using Javascript

I want to get all the transcripts for all the videos on a youtube channel. This is my code.

async function getVideoTranscripts(videoId) {  try {    const response = await axios.get(      `https://www.googleapis.com/youtube/v3/captions?part=snippet&videoId=${videoId}&key=${process.env.YOUTUBE_API_KEY}`    );    const captionIds = response.data.items.map((item) => item.id);    // Step 2: Fetch transcripts for each caption    const transcriptPromises = captionIds.map(async (captionId) => {      try {        const transcriptResponse = await axios.get(          `https://www.googleapis.com/youtube/v3/captions/${captionId}&key=${process.env.YOUTUBE_API_KEY}`,          {            headers: {              Authorization: `Bearer ${accessToken}`,            },          }        );        return transcriptResponse.data.body;      } catch (error) {        console.error(          `Error fetching transcript for caption ${captionId}:`,          error        );        return null;      }    });    const transcripts = await Promise.all(transcriptPromises);    return transcripts.filter((transcript) => transcript !== null);  } catch (error) {    console.error(`Error fetching transcripts for video ${videoId}:`, error);    return [];  }}

However, I keep getting this error:

AxiosError {message: 'Request failed with status code 401', name: 'AxiosError', code: 'ERR_BAD_REQUEST', config: {…}, request: XMLHttpRequest, …}

My API key has full permission from the console to make any request. I am not exactly sure why this is failing.