User Types
GET {{api-domain}}/crm/v4/settings/portals/{portal_name}/user_type/{user_type_id}
User type is a label for the users who will be accessing the CRM modules via portal. You can configure permissions for the user types that will enable or restrict access to the data in the CRM account. Some examples of portal user types are vendors, clients, consultants, customers, partners, or resellers.
Use this API to get the user types available in a portal of your org.