'nullable|min:2|max:255', 'last_name' => 'required|min:3|max:255', 'first_name' => 'required|min:3|max:255', 'email' => 'nullable|email|max:100', 'identifier_orcid' => 'nullable|min:19|max:50', 'status' => 'required|boolean' ]; } }