Merge branch 'add_get_for_single_identity' into 'master'

Adding get for single identity

See merge request !29

greg/api/urls.py

@@ -43,7 +43,9 @@ urlpatterns += [
     ),
     re_path(
         r"^persons/(?P<person_id>[0-9]+)/identities/(?P<id>[0-9]+)$",
-        PersonIdentityViewSet.as_view({"delete": "destroy", "patch": "partial_update"}),
+        PersonIdentityViewSet.as_view(
+            {"get": "retrieve", "delete": "destroy", "patch": "partial_update"}
+        ),
         name="person_identity-detail",
     ),
     re_path(