def on_connect(client, userdata, flags, reason_code, properties=None):
    client.subscribe(topic="topic/important")
def on_message(client, userdata, message, properties=None):
    print(
        f"(Received message {message.payload} on topic '{message.topic}' with QoS {message.qos}"
    )
def on_subscribe(client, userdata, mid, qos, properties=None):
    print(f"Subscribed with QoS {qos}")