minor fixes

ocpp/charge_point.py

@@ -7,7 +7,7 @@
 from dataclasses import asdict
 from typing import Dict, List, Union
 
-from ocpp.exceptions import NotSupportedError, OCPPError
+from ocpp.exceptions import NotImplemtendError, NotSupportedError, OCPPError
 from ocpp.messages import Call, MessageType, unpack, validate_payload
 from ocpp.routing import create_route_map
 
@@ -173,7 +173,7 @@ async def _handle_call(self, msg):
         try:
             handlers = self.route_map[msg.action]
         except KeyError:
-            raise NotSupportedError(
+            raise NotImplemtendError(
                 details={"cause": f"No handler for {msg.action} registered."}
             )