I'm trying to create user sessions via Google Cloud Functions (Express-session).
Since no storage is available by default, I'm looking for the best (cheapest/easiest) solution to save my session data.
In this list, the supported services are listed: https://cloud.google.com/functions/docs/concepts/services
I've tried SQL but this is not available as a service, BigTable/Spanner requires continues uptime (= not cheap), Firebase looks quite complex and DataStore is not available since I have no App Engine.
Can someone point me into the right direction? It's just a hobby project so it does not have to scale hard.