- ID: The ID of the pupil or teacher from the Schulverwaltungssoftware.
- class: Class of the pupil (teacher)
- role: Role of the user (CSchool::SCHOOL_ROLE_TEACHER, ::SCHOOL_ROLE_PUPIL, ::SCHOOL_ROLE_SCHOOLADMIN)
- true, if the user was added successfully, otherwise (error) messages from the FreeIPA API.