Bug dcc 453 api not providing owner email anymore

app/views/api/v0/statistics/plans.json.jbuilder

@@ -21,6 +21,10 @@ json.plans @org_plans.each do |plan|
     json.name         plan.contributors.investigation.first&.name
   end
 
+  json.owner  do
+    json.email plan.owner.present? ?  plan.owner.email : ""
+  end
+
   json.data_contact do
     json.info         plan.contributors.data_curation.first&.name
   end