Show me how to solve this issue Your account cannot be authenticated

Image API
1

function uploadToImageKit($fileUrl, $fileName, $privateKey)

{

$ch = curl_init('https://upload.imagekit.io/api/v1/files/upload');



curl_setopt_array($ch, \[

    CURLOPT_POST           => true,

    CURLOPT_RETURNTRANSFER => true,

    CURLOPT_TIMEOUT        => 60,

    CURLOPT_USERPWD        => $privateKey . ":", // ✅ BEST WAY (no manual base64)

    CURLOPT_POSTFIELDS     => \[

        'file'              => $fileUrl, // ✅ URL works directly

        'fileName'          => $fileName,

        'folder'            => '/uploads',

        'useUniqueFileName' => true, // ✅ boolean

    \],

\]);



$response  = curl_exec($ch);

$httpCode  = curl_getinfo($ch, CURLINFO_HTTP_CODE);

$curlError = curl_error($ch);

curl_close($ch);



if ($curlError) {

    echo "cURL Error: $curlError<br/>";

    return null;

}



$decoded = json_decode($response, true);



if ($httpCode !== 200) {

    echo "ImageKit Error (HTTP $httpCode): " . ($decoded\['message'\] ?? $response) . "<br/>";

    return null;

}



return $decoded;

}

this is my code