Bind oauth applications to users

db/migrate/20160314164231_add_owner_to_application.rb

@@ -0,0 +1,7 @@
+class AddOwnerToApplication < ActiveRecord::Migration
+  def change
+    add_column :oauth_applications, :owner_id, :integer, null: true
+    add_column :oauth_applications, :owner_type, :string, null: true
+    add_index :oauth_applications, [:owner_id, :owner_type]
+  end
+end