invalidateUserCache
    :: MonadIO m
    => UserCache -> m ()
invalidateUserCache = liftIO . atomically . flip writeTVar nullCacheData
invalidateUserCache
    :: MonadIO m
    => UserCache -> m ()
invalidateUserCache = liftIO . atomically . flip writeTVar nullCacheData
invalidateUserCache = liftIO . atomically . flip writeTVar nullCacheData