Update README example for new use

README.md

@@ -4,21 +4,24 @@ Async library to react to events issued over Plex websockets.
 ## Example use
 ```python
 import asyncio
+import logging
 from plexapi.server import PlexServer
-from plexwebsocket import PlexWebsocket
+from plexwebsocket import PlexWebsocket, SIGNAL_CONNECTION_STATE
+
+logging.basicConfig(level=logging.DEBUG)
 
 baseurl = 'http://<PLEX_SERVER_IP>:32400'
 token = '<YOUR_TOKEN_HERE>'
 plex = PlexServer(baseurl, token)
 
-def print_info(signal, data, error):
-    if signal == "data":
-        print(f"Data: {data}")
-    elif signal == "state":
+def print_info(msgtype, data, error):
+    if msgtype == SIGNAL_CONNECTION_STATE:
         print(f"State: {data} / Error: {error}")
+    else:
+        print(f"Data: {data}")
 
 async def main():
-    ws = PlexWebsocket(plex, print_info)
+    ws = PlexWebsocket(plex, print_info, subscriptions=["playing", "state"])
     await ws.listen()
 
 if __name__ == '__main__':