diff --git a/index.php b/index.php
index 970f7d0..f386937 100644
--- a/index.php
+++ b/index.php
@@ -8,14 +8,14 @@
     'base_url' => 'https://paysgator.com/api/v1/', // Optional, defaults to production
 ]);
 
-$apiKey="";
-$walletId="";
+$apiKey = getenv('PAYSGATOR_API_KEY') ?: '';
+$walletId = getenv('PAYSGATOR_WALLET_ID') ?: '';
 
 // Authenticate to get a new token (automatically sets it on the client)
 $response = $client->auth()->authenticate($apiKey, $walletId);
 $token = $response['accessToken'];
 
-//Genrating a direct charge
+// Generating a direct charge
 
 $directCharge = $client->paymentLinks()->create([
     'amount' => 0.01,
@@ -30,5 +30,5 @@
     'confirm'=>true
 ]);
 
-print_r($directCharge);
+// print_r($directCharge); // Consider using logging instead
 
diff --git a/src/PaysgatorClient.php b/src/PaysgatorClient.php
index ae8682b..01dbb0b 100644
--- a/src/PaysgatorClient.php
+++ b/src/PaysgatorClient.php
@@ -3,7 +3,7 @@
 namespace Paysgator;
 
 use GuzzleHttp\Client;
-use GuzzleHttp\Exception\GuzzleException;
+
 use Paysgator\Resources\Payments;
 use Paysgator\Resources\Subscriptions;
 use Paysgator\Resources\Transactions;