Fix null status code

Author: jaredthecoder

quickbooks/client.py

@@ -343,6 +343,9 @@ def handle_exceptions(results):
                 except ValueError:
                     code = 0
 
+            if code == "" and "statusCode: 401" in detail:
+                raise exceptions.AuthorizationException(message, 401, detail)
+
             if 0 < code <= 499:
                 raise exceptions.AuthorizationException(message, code, detail)
             elif 500 <= code <= 599: