From b3d820e58c8cd85dd36bb5a6ee3708e5e2bba9d4 Mon Sep 17 00:00:00 2001
From: webprofusion-chrisc <christopher.cook@webprofusion.com>
Date: Sun, 11 Aug 2024 17:16:31 +0800
Subject: [PATCH] TransIP: fix exception when logging private key error

---
 .../DNS/TransIP/Authentication/DigestSigner.cs                  | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Certify.Providers/DNS/TransIP/Authentication/DigestSigner.cs b/src/Certify.Providers/DNS/TransIP/Authentication/DigestSigner.cs
index 7426ad641..74609f6de 100644
--- a/src/Certify.Providers/DNS/TransIP/Authentication/DigestSigner.cs
+++ b/src/Certify.Providers/DNS/TransIP/Authentication/DigestSigner.cs
@@ -33,7 +33,7 @@ private static ICipherParameters GetCipherParameters(object pem)
                 case AsymmetricCipherKeyPair keyPair:
                     return keyPair.Private;
                 default:
-                    throw new NotImplementedException($"Error getting cipher parameters. '{pem.GetType()}' is not supported.");
+                    throw new NotImplementedException($"Error getting cipher parameters. '{(pem?.GetType())}' is not supported. Check key is a valid PEM format private key.");
             }
         }