Magento2 - Netsuite intergration - CURL request - throws Invalid login attempt

Question

I try to connect to Netsuite API from Magento2. throws Invalid login attempt from Netsuite. my code is below please help me .

public function createPostRequest($type, $params, $page_constant){
    try{

        if(!trim($this->NETSUITE_ACCOUNT)){
            $this->reloadNetsuiteConfigData();
        }

        $data_string = json_encode($params);

        $deploy = $page_constant['deploy'];
        $script = $page_constant['script'];

        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $this->NETSUITE_URL . '?&script=' . $script . '&deploy=' . $deploy . '&realm=' . $this->NETSUITE_ACCOUNT);
        curl_setopt($ch, CURLOPT_POST, "POST");
        curl_setopt($ch, CURLOPT_POSTFIELDS, $data_string);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_HTTPHEADER, [
            'Authorization: ' . $this->PostHeaderGenerate( $params, $page_constant),
            'Content-Type: application/json',
            'Content-Length: ' . strlen($data_string)
        ]);

        $response = curl_exec($ch);
        curl_close($ch);

        $this->addLogs->add_info('createPostRequest - response', ['type' => $type, 'response' => $response], 'netsuite-curl');
        return $response;


    } catch (\Exception $exception){
        $this->addLogs->add_error('createPostRequest', ['type' => $type, $exception->getMessage()], 'netsuite');
    }
}

public function PostHeaderGenerate( $params, $page_constant)
{

    if(!trim($this->NETSUITE_ACCOUNT)){
        $this->reloadNetsuiteConfigData();
    }

    $deploy = $page_constant['deploy'];
    $script = $page_constant['script'];
    $data_string = json_encode($params);
    $oauth_nonce = md5(mt_rand());
    $oauth_timestamp = time();
    $oauth_signature_method = 'HMAC-SHA256';
    $oauth_version = "1.0";

    $base_string =
        "POST&" . urlencode($this->NETSUITE_URL) . "&" .
        urlencode(
            "deploy=" . $deploy
            . "&oauth_consumer_key=" . $this->NETSUITE_CONSUMER_KEY
            . "&oauth_nonce=" . $oauth_nonce
            . "&oauth_signature_method=" . $oauth_signature_method
            . "&oauth_timestamp=" . $oauth_timestamp
            . "&oauth_token=" . $this->NETSUITE_TOKEN_ID
            . "&oauth_version=" . $oauth_version
            . "&realm=" . $this->NETSUITE_ACCOUNT
            . "&script=" . $script
        );

    $sig_string = urlencode($this->NETSUITE_CONSUMER_SECRET) . '&' . urlencode($this->NETSUITE_TOKEN_SECRET);
    $signature = base64_encode(hash_hmac("sha256", $base_string, $sig_string, true));

    $header = "OAuth "
        . 'oauth_signature="' . rawurlencode($signature) . '", '
        . 'oauth_version="' . rawurlencode($oauth_version) . '", '
        . 'oauth_nonce="' . rawurlencode($oauth_nonce) . '", '
        . 'oauth_signature_method="' . rawurlencode($oauth_signature_method) . '", '
        . 'oauth_consumer_key="' . rawurlencode($this->NETSUITE_CONSUMER_KEY) . '", '
        . 'oauth_token="' . rawurlencode($this->NETSUITE_TOKEN_ID) . '", '
        . 'oauth_timestamp="' . rawurlencode($oauth_timestamp) . '", '
        . 'realm="' . rawurlencode($this->NETSUITE_ACCOUNT) .'"';

    $this->addLogs->add_info('header', [$header], 'netsuite-params');
    return  $header;
}