To give another user access to your statistics:
To give access to all users for viewing your statistics, set Make stats publicly available to On. You will see a box with the URL for viewing statistics for this counter.
In order to view the statistics, a user must be registered and logged in on Yandex. If you installed the Yandex.Metrica informer on your site, users can just click on this informer to view public statistics.
You can grant complete access to your Yandex.Metrica account to anyone with a Yandex username. Representatives receive full rights to view, edit and delete any of the account's counters (including guest counters).