User
From Senfi Docs
User is the account that uses Senfi. Users are created and used within organization in Senfi. User can be assigned to one or more access groups.
Organization
An organization represents the entity (eg. company, individual) that is responsible for managing the account that uses Senfi. An organization comprises at least one user with Administrator role. Users with Administrator role are able to manage other users, including user account creation/deletion, user roles etc.