diff --git a/Program/V1/Services/PushService.cs b/Program/V1/Services/PushService.cs
index 55f5631..3342858 100644
--- a/Program/V1/Services/PushService.cs
+++ b/Program/V1/Services/PushService.cs
@@ -16,9 +16,20 @@ public class PushServiceWithP12
 
     public PushServiceWithP12(string keysFilePath, string p12Path, string apnsTopic)
     {
+        // 존재 안하면 예외 던져 버리는거
+        if (!File.Exists(keysFilePath))
+        {
+            Console.WriteLine($"File not found: {keysFilePath}");
+            throw new FileNotFoundException("The specified file was not found", keysFilePath);
+        }
+        
         var keys = JsonSerializer.Deserialize<Dictionary<string, string>>(File.ReadAllText(keysFilePath));
         // TEST
-        Console.WriteLine($"File Exists: {keys}");
+        Console.WriteLine("Keys content:");
+        foreach (var key in keys)
+        {
+            Console.WriteLine($"{key.Key}: {key.Value}");
+        }
         
         p12Password = keys["Password"];
         this.p12Path = p12Path;
@@ -47,9 +58,10 @@ public class PushServiceWithP12
         try
         {
             var certificate = new X509Certificate2(p12Path, p12Password,
-            X509KeyStorageFlags.MachineKeySet | X509KeyStorageFlags.PersistKeySet | X509KeyStorageFlags.Exportable);
-            
+            X509KeyStorageFlags.MachineKeySet | X509KeyStorageFlags.PersistKeySet | X509KeyStorageFlags.Exportable
+            );
             handler.ClientCertificates.Add(certificate);
+            Console.WriteLine("Certificate successfully loaded.");
         }
         catch (CryptographicException ex)
         {