Closes #17143: Deprecate the use of dedicated nested API serializers

netbox/circuits/api/serializers_/nested.py

@@ -0,0 +1,13 @@
+from circuits.models import ProviderAccount
+from netbox.api.serializers import WritableNestedSerializer
+
+__all__ = (
+    'NestedProviderAccountSerializer',
+)
+
+
+class NestedProviderAccountSerializer(WritableNestedSerializer):
+
+    class Meta:
+        model = ProviderAccount
+        fields = ['id', 'url', 'display_url', 'display', 'name', 'account']