Voucher for temporary access for guests

Look, I like your security-minded approach to actiontiles but registering for an account, especially for those who operate a B&B and want to give access to a specific panel to control the lights in the apartment, is not an option.

Please implement a voucher based, calendar integrated kind of system to grant access to our guests. There's gotta be a way to do this securely! It will likely increase the overall usage.

Thank you.