As the igloohome SmartLock works offline, PIN codes cannot be de-activated remotely via the app once they have been issued. This however, can be done via Bluetooth (i.e. in close range of the lock) to ensure the PIN code is no longer valid.
Home owners are advised to be cautious when granting access to guests - it’s similar to entrusting someone with your key.
Alternatively, you may wish to share a Bluetooth Key. Bluetooth Keys can be revoked remotely.