Multiple ChoiceBeginner 45s
Mobile push token lifecycle handling
Push delivery fails for users who reinstalled the app. What must the backend do with device tokens?
Options
- 1Prune tokens reported as invalid/unregistered and refresh them on app registration
- 2Keep every device token forever so no user ever needs to re-register the app
- 3Send every push to all tokens a user has ever had across all past installs
- 4Store all device tokens in a browser cookie that the backend reads on push
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