Fixing a typo in the bot lookup logic

src/app.py

@@ -62,8 +62,8 @@ def teamspeak():
 def execute():
     json = request.get_json()
     msg = RollbotMessage.from_groupme(json, global_admins=GLOBAL_ADMINS, group_admins=GROUP_ADMINS)
-    if msg.group_id in BOTS_LOOKUP:
-        self.logger.warning(f"Received message from unknown group ID {msg.group_id}")
+    if msg.group_id not in BOTS_LOOKUP:
+        app.logger.warning(f"Received message from unknown group ID {msg.group_id}")
         return "", 400
     t = Thread(target=lambda: rollbot.handle_command(msg))
     t.start()