Users is where you can view and manage your organization's memberships.
You can invite users to your organization if you have their email address. Once the invite has been sent, you will be able to track their invite's status through the same screen.
Each user must belong to one of the following roles:
Admin. Has full permissions at the organization level.
Worker. Can view all workflows and work their tasks.
You may update anyone's role at any time. This includes invited users, even before they have created an account.
You may also remove users from the organization, after which they will not be able to access the org. This will have no effect to the user's other organizations, or to their future ability to create a new one.