fix: learner home serializer key error (#32842)

* fix: allow missing authOrgId

---------

Co-authored-by: Leangseu Kim <lkim@edx.org>

lms/djangoapps/learner_home/serializers.py

@@ -563,7 +563,7 @@ class EnterpriseDashboardSerializer(serializers.Serializer):
     label = serializers.CharField(source="name")
     url = serializers.SerializerMethodField()
     uuid = serializers.UUIDField()
-    authOrgId = serializers.CharField(source="auth_org_id")
+    authOrgId = serializers.CharField(source="auth_org_id", allow_null=True)
     isLearnerPortalEnabled = serializers.BooleanField(source="enable_learner_portal")
 
     def get_url(self, instance):

lms/djangoapps/learner_home/test_serializers.py

@@ -1164,6 +1164,12 @@ class TestEnterpriseDashboardSerializer(TestCase):
             },
         )
 
+    def test_no_auth_org_id(self):
+        """ Test for missing auth_org_id """
+        input_data = self.generate_test_enterprise_customer()
+        del input_data['auth_org_id']
+        self.assertIsNone(EnterpriseDashboardSerializer(input_data).data['authOrgId'])
+
 
 class TestSocialMediaSettingsSiteSerializer(TestCase):
     """Tests for the SocialMediaSiteSettingsSerializer"""