What options does each user have?
There are five types of user: API; admin user; data editor; data viewer; or a custom user designed by you.
The API option is for if you are going to integrate your own IT system.
Admin User: This will be the primary contact and will have full rights and access over the account (you can have multiple admin users)
Data Editor: Gives full editing rights on all fields but cannot create groups, permissioning rights or create other users
Data Viewer: Can view the account in a read-only format
Custom: You can tailor the user privileges using the options shown in the image below.