fix: owners add login

app/views/owners/index.json.jbuilder

@@ -2,6 +2,7 @@ json.total_count @owners.size
 json.owners @owners.each do |owner|
   json.id owner.id
   json.type owner.type
+  json.login owner.login
   json.name owner&.show_real_name
   json.avatar_url url_to_avatar(owner)
 end