As workspace Owner or Manager you can add team members to your space. In the "members" section of your space settings you find the option to add team members to your space. Team members of your space get access to all projects and folders within the space. If you are logged in you find the space settings here: https://workspace.picter.com/settings/
Each team member counts to your team's pricing plan.
To manage permissions within your team, there are different roles for team members:
More about the roles of team members here.