User roles determine the access level or permissions of your teammates. Forest Admin allows you to set up three different roles :
Admin - can access project settings (manage teams, user roles, and environments), customize the admin UI (activate layout editor) and manage data.
Editor - can customize the admin UI (activate layout editor) and manage data.
User - can only manage data.
You can assign user roles in your project settings.
Go to your project Settings (1).
Access the "Users" section (2).
Assign roles to each of your teammates (3).