Product plans. These features and policies are still in development.
The planned design is one private account for one human, with explicit role spaces inside it. Multiple roles are not the same thing as multiple people sharing an identity. The complete customer account experience is not yet available to customers.
Do not share credentials or use another person's identity to explore a preview. If you are thinking about a team or organization need, keep the people and responsibilities separate in your notes. Future collaboration features will need to explain their own access rules rather than relying on a shared personal login.