Unfortunately, the built-in Construct 3 doesn't have that yet. Although, we do have that a complete back-end cloud feature collection, the PlayFab Master Collection under the Construct Master Collection.
You can check it out here:
construct.net/en/forum/construct-3/plugin-sdk-10/construct-master-collection-139046
It supports the following platforms, and accounts are automatically synced across all devices, even on multiple games under the same name of a Studio. It's originally made for an MMO backend system, so it also have guilds, multiplayer, trading, virtual and real currencies, cdn features, etc.
Synced platforms:
- Your Own Company Authentication
- Cryptography, a.k.a Custom
- GameCenter
- GooglePlay
- Steam
- XBoxLive
- Kongregate
- Facebook
- IOSDevice
- AndroidDevice
- WindowsHello
- FacebookInstantGames
If you port through Chowdren:
- Nintendo Switch
- PS4