Forgot to readd join function!

main.py

@@ -27,6 +27,13 @@ def settings():
 def room(room_code):
     return render_template('room.html', room_code=room_code)
 
+@app.route('/api/room/<code>', methods=['GET'])
+def check_room(code):
+    room = registry.get_room(code)
+    if not room:
+        return jsonify({"error": "Room not found"}), 404
+    return jsonify({"code": room.code})
+
 @socketio.on('message')
 def handle_message(data):
     room_code = data['room']