1. Open your account and click Account settings. 

2. Go to Shared Access.

3. Write down user's email with whom you want to share your account. Do not forget to click Share access to save the changes. 

!!! The invited user will have full access to your container.

4. For invited users to see or edit shared container, they need to log in to their account, click on their email at the top right corner and select "Workspace."