diff --git a/src/ReC.Application/RecActions/Commands/InvokeRecActionCommand.cs b/src/ReC.Application/RecActions/Commands/InvokeRecActionCommand.cs
index f564b19..7f72707 100644
--- a/src/ReC.Application/RecActions/Commands/InvokeRecActionCommand.cs
+++ b/src/ReC.Application/RecActions/Commands/InvokeRecActionCommand.cs
@@ -107,10 +107,15 @@ public class InvokeRecActionCommandHandler(
             case "Digest Auth":
             case "OAuth 1.0":
             case "AWS Signature":
-                // These authentication methods require more complex implementations,
-                // often involving multi-step handshakes or specialized libraries.
-                // They are left as placeholders for future implementation.
-                break;
+            // These authentication methods require more complex implementations,
+            // often involving multi-step handshakes or specialized libraries.
+            // They are left as placeholders for future implementation.
+            default:
+                throw new NotImplementedException(
+                    $"The authentication type '{action.EndpointAuthType}' is not supported yet. " +
+                    $"ProfileId: {action.ProfileId}, " +
+                    $"Id: {action.Id}"
+                );
         }
 
         using var response = await http.SendAsync(httpReq, cancel);