Solved
php sdk 401
I am using php sdk to get lsts but getting 401 , i got access token using oauth and passing access token at place of api key in klviyo object but getting unauthenticated
$klaviyo = new KlaviyoAPI(
ACCESS TOKEN(insted of api key),
$num_retries = 3,
$wait_seconds = 3,
$guzzle_options = [],
$user_agent_suffix = "/YOUR_APP_NAME");