@Bunzaga I think I overcomplicated my terminology for this work. You should be able to generate an 8 number or characters ID which we’ll call the “trust key”. You would then use this value to display to the user and have them input it on a second device.
The value itself would just be stored as a device ID in the server via the LinkAsync option. Then on the second device the AuthenticateDeviceAsync option would be used with the value input by the user. It would be under some kind of UI menu option “Attach New Device” or similar.
Hope that helps.