fix(auth): clear tokens of expired sessions on startup

Maximilian Fußrequested to merge
m.fuss/web-app:3598-backport-auth-clear-tokens-of-expired-sessions-on-startup-to-26-3-x-v2-10-x into release/v2.10.x

fix(auth): clear tokens of expired sessions on startup

Closes #3598 (closed)

(cherry picked from commit 93347c83)

Closes #3598 (closed)

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