Change Details

1. `flow check` 2. Test login with different sources (from the native, web, on session recovery when cookie expired) and make sure provided `source` is correct.

1. `flow check` 2. Test login with different sources (from the native, web, on session recovery when cookie expired) and make sure provided `source` is correct. 3. Make sure it works for older native clients (e.g. pass `source` as `undefined`)

1. `flow check` 2. Test login with different sources (from the native, web, on session recovery when cookie expired) and make sure provided `source` is correct. 3. Make sure it works for older native clients (e.g. pass `source` as `undefined`)