fix for un-authed servers

Author: technige

neo4j/v1/connection.py

@@ -215,7 +215,7 @@ def __init__(self, sock, **config):
         # Determine auth details
         try:
             self.auth_dict = vars(config["auth"])
-        except KeyError:
+        except (KeyError, TypeError):
             self.auth_dict = {}
 
         # Pick up the server certificate, if any