Update README.md

Author: atye

README.md

@@ -52,4 +52,7 @@ See `ttchat -h` for options and arguments
 Obtaining an access token requires you to login via your default browswer. To provide your own token, use the `--token` flag.
 See https://dev.twitch.tv/docs/authentication/getting-tokens-oauth for more details on obtaining your own access token.
 
-`ttchat -c ludwing --token $ACCESS_TOKEN`
+`ttchat --channel ludwing --token $ACCESS_TOKEN`
+
+## Notes
+The token must have the `chat:edit` and `chat:read` scopes