pub async fn update(
backend: &SessionBackend,
sealer: &CookieSealer,
cookie_value: &str,
payload: &[u8],
ttl: Duration,
meta: SessionMeta,
cookie_name: &str,
attrs: &CookieAttrs<'_>,
) -> Result<Option<String>, StoreError>Expand description
Rewrites an existing session’s payload (token refresh). Redis mode: put under the SAME id (cookie unchanged → returns None). Cookie mode: the caller must send a fresh cookie (returns Some(set_cookie)).