Teams are Project Member user groups that can invite End Users and Run environments in their specific organizations. To create a Team within your Project, you can head to the 'Team' menu:
And add users
Project Managers can add different Teams (whether partners/re-sellers or different business units), each one headed by a Team Manager. Team Managers are limited to the scope of their own team. Only Project Managers can oversee all activities across all Teams in their project(s). Blueprints can then be assigned to this Project.