Ensure Solid Authentication is not lost

[kkalass]

Affected Package

locorda_solid

Steps to Reproduce

Start the example app when it is offline.

Actual Behavior

Not tested, but I assume that authentication is lost, maybe only if started after some days.

Expected Behavior

Ensure that the user stays connected to the solid pod and that sync is resumed when online

Platform

Flutter (Web), Flutter (iOS), Flutter (Android), Flutter (macOS), Flutter (Windows), Flutter (Linux)

Environment

No response

Additional Context

No response