You must set parameters and obtain return values based on the corresponding specifications when your application server calls operations of the authentication server. Otherwise, the call may fail. This topic describes the API operations related to device access credentials in Message Queue for MQTT.

Operation Description
RegisterDeviceCredential Creates an access credential for a device.
GetDeviceCredential Queries the access credential of a device.
UnRegisterDeviceCredential Deletes the access credential of a device.
RefreshDeviceCredential Updates the access credential of a device.