Got any examples for https://github.com/aws/aws-sdk-js-v3 or https://github.com/mhart/aws4fetch?

I haven't been able to get either working:

  const s3Client = new S3Client({
    endpoint: 'https://my-account-id.r2.cloudflarestorage.com',
    credentials: secrets.r2Credentials,
  })

  await s3Client.send(
    new PutObjectCommand({
      Bucket: 'my-bucket,
      Key: 'test',
      Body: JSON.stringify({hello: 'world'}),
    }),
  )

^ This fails with a 500

  const r2Client = new AwsClient({
    ...secrets.r2Credentials,
  })

  fetch(
    await r2Client.sign(
      'https://my-account-id.r2.cloudflarestorage.com/' +
        '?Key=test&Bucket=my-bucket',
      {
        method: 'put',
        body: JSON.stringify({ hello: 'world' }),
      },
    ),
  ).then((response) => console.log(response.status))

^ This fails with 401

I've verified that the key has full access and even rerolled it to make sure I didn't mess up the copy paste, but still no luck.

Any ideas where I could be going wrong?