Support for per-user API keys

app/serializers/api_key_serializer.rb

@@ -0,0 +1,12 @@
+class ApiKeySerializer < ApplicationSerializer
+
+  attributes :id,
+             :key
+
+  has_one :user, serializer: BasicUserSerializer, embed: :objects
+
+  def include_user_id?
+    !object.user_id.nil?
+  end
+
+end