TypeError on disconnected client

I have a client device which is frequently disconnecting and connecting, what apparently makes unify to skip some of the stats and that causes crash:

TypeError (unsupported operand type(s) for /: 'NoneType' and 'int')
  File "/omd/sites/cmk/lib/python3/cmk/base/agent_based/checking/_checking.py", line 413, in get_aggregated_result
    consume_check_results(
  File "/omd/sites/cmk/lib/python3/cmk/base/api/agent_based/checking_classes.py", line 484, in consume_check_results
    for subr in subresults:
  File "/omd/sites/cmk/lib/python3/cmk/base/api/agent_based/register/check_plugins.py", line 93, in filtered_generator
    for element in generator(*args, **kwargs):
  File "/omd/sites/cmk/local/lib/python3/cmk/base/plugins/agent_based/unifi.py", line 987, in check_unifi_user
    yield Result(state=State.OK, notice=f"RX-Rate: %sMbps" % int(users.get('rx_rate') / 1000))

This is the users variable:

 'users': {'_id': '614c50ffcd175e7e7c84dd42',
           '_is_guest_by_ugw': False,
           '_is_guest_by_usw': False,
           '_last_reachable_by_gw': 1707395661,
           '_last_seen_by_ugw': 1707395663,
           '_last_seen_by_usw': 1707395661,
           '_uptime_by_ugw': 2023627,
           '_uptime_by_usw': 2023625,
           'anomalies': -1,
           'assoc_time': 1705372036,
           'authorized': True,
           'bytes-r': 0.0,
           'confidence': 37,
           'dev_cat': 51,
           'dev_family': 7,
           'dev_id': 3262,
           'dev_vendor': 381,
           'device_name': 'LIFX lighting',
           'disconnect_timestamp': 1707395602,
           'eagerly_discovered': True,
           'fingerprint_engine_version': '0.0.0',
           'fingerprint_source': 0,
           'first_seen': 1632391423,
           'fixed_ap_enabled': False,
           'fixed_ip': 'X',
           'fw_version': '',
           'gw_mac': 'X',
           'gw_vlan': 3,
           'hostname': 'ESP-C4A40A',
           'hostname_source': 'ubios',
           'is_guest': False,
           'is_wired': False,
           'last_connection_network_id': '61580ae7cd175e7e7c880323',
           'last_connection_network_name': 'IOT',
           'last_ip': '192.168.103.31',
           'last_seen': 1707395661,
           'latest_assoc_time': 1705372036,
           'mac': 'X',
           'name': 'Meteostanice',
           'network': 'IOT',
           'network_id': 'X',
           'noted': True,
           'os_name': 1,
           'oui': 'Espressif Inc.',
           'qos_policy_applied': True,
           'rx_bytes': 0,
           'rx_bytes-r': 0.0,
           'rx_packets': 0,
           'satisfaction_avg': {'count': 2, 'total': 0},
           'score': 57,
           'site_id': 'X',
           'tx_bytes': 0,
           'tx_bytes-r': 0.0,
           'tx_packets': 0,
           'uptime': 2023625,
           'use_fixedip': False,
           'user_id': 'X',
           'usergroup_id': '',
           'wlanconf_id': 'X'}}

I think using users.get('rx_rate', 0) could be an appropriate solution here (and same for tx_rate).