get
Get default wristband.
If none device has been previously saved (by set) or it has been forgotten (by forget) then default device will be emitted.
NOTE: User must be valid.
Return
Single what emits wristband
Get default wristband.
If none device has been previously saved (by set) or it has been forgotten (by forget) then default device will be emitted.
NOTE: User must be valid.
Single what emits wristband