AUTH packet - Authentication exchange (MQTT 5.0 only).
MQTT 5.0 §3.15
Optional
Readonly
AUTH properties
Reason code (0x00=success, 0x18=continue, 0x19=re-auth)
Packet type discriminator.
AUTH packet - Authentication exchange (MQTT 5.0 only).
See
MQTT 5.0 §3.15