Lets one Things5 CA certificate connect several devices (gateway).
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Binds device_id to the certificate of source_device_id, so that one MQTT connection (one certificate, client ID = its certificate id) can publish and receive messages for both devices. Use it for gateways that connect several devices to Things5.
Only certificates issued by the Things5 CA can be shared: first generate one for the source device with Generate certificate (Things5 CA), then call this endpoint for each additional device. The gateway connects to v2.mqtt.things5.digital (see Connecting a device) and uses the topics of each device, things5-production/v1/devices/{device_id}/....
Generating a new certificate for
device_idlater unbinds it from the shared certificate.
