To use Yandex.Connect, you have to create a new company or join an existing one.
Create a company
Any Yandex user can create a company in Yandex.Connect:
Finish signing up and you are the owner in Yandex.Connect. You can now add domains and services, invite other users to join your company, manage paid features, and much more.
Join an existing company
You can join an existing company if invited by a company administrator. To do this:
Open the invitational email and click the invite link.
Specify the existing Yandex account you want to use in that company or register a new one.
After you're done, you will gain access to all the Yandex.Connect services available at that particular company.