1. Running `flow check`.
2. Checking all callers of `resolveInvalidatedCookie` - it's called only by `fetchNewCookieFromNativeCredentials` and `source` was [[ https://github.com/CommE2E/comm/blob/013cf5a51ca823409699ad22dc7e9b8914d59dab/lib/utils/action-utils.js#L181 | required there previously ]] and everywhere `fetchNewCookieFromNativeCredentials` is called `source` is passed explicitly from `loginActionSources`.