add data_bank to user action

app/models/organization_user.rb

@@ -5,6 +5,7 @@
 #  id              :integer          not null, primary key
 #  user_id         :integer
 #  organization_id :integer
+#  is_creator      :boolean          default("0")
 #  created_at      :datetime         not null
 #  updated_at      :datetime         not null
 #