test: der key length

Signed-off-by: exploreriii <[email protected]>

Author: exploreriii

test.py

@@ -74,7 +74,7 @@ def load_operator_credentials():
     """Load operator credentials from environment variables."""
     try:
         operator_id = AccountId.from_string(os.getenv('OPERATOR_ID'))
-        operator_key = PrivateKey.from_string_ecdsa(os.getenv('OPERATOR_KEY'))
+        operator_key = PrivateKey.from_string_der(os.getenv('OPERATOR_KEY'))
     except Exception as e:
         print(f"Error parsing operator credentials: {e}")
         print(traceback.format_exc())