def list_certificates(palo: PanDevice):
certs = palo.op('request certificate show')
certs_dict = etree_to_dict(certs)
expired = []
now = (datetime.datetime.now() + datetime.timedelta(days=2)).timestamp()
for cert in certs_dict['response']['result']['entry']:
if float(cert['expiry']) < now:
expired.append(cert)
return expired
