Fix social-app-django/issues/355

Handle the case where the user has not registered a `family-name` and
ORCID returns `None`.

CHANGELOG.md

@@ -5,6 +5,11 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
+## [Unreleased]
+
+### Changed
+- Handle case where user has not registered a `family-name`  with ORCID
+
 ## [4.5.4](https://github.com/python-social-auth/social-core/releases/tag/4.5.4) - 2024-04-25
 
 ### Added

social_core/backends/orcid.py

@@ -76,7 +76,8 @@ def get_user_details(self, response):
 
             if name:
                 first_name = name.get("given-names", {}).get("value", "")
-                last_name = name.get("family-name", {}).get("value", "")
+                if name.get("family-name", None) is not None:
+                    last_name = name.get("family-name").get("value", "")
 
             emails = person.get("emails")
             if emails: