configure iD editor on own osm server

Hi, I created my own osm server and I appended some data. I would like to use iD editor to change something, but I'm not able to do it. When I press edit tab in the web I receive the application error 500. In the following the lines in the production.log:

I, [2015-06-24T09:16:14.256607 #14679] INFO -- : Rendered site/id.html.erb (182.3ms) I, [2015-06-24T09:16:14.256943 #14679] INFO -- : Completed 500 Internal Server Error in 189ms (ActiveRecord: 3.1ms) F, [2015-06-24T09:16:14.258915 #14679] FATAL -- : ActionView::Template::Error (undefined method access_token_for_user' for nil:NilClass): 28: .locale("<%= locale %>", "<%= asset_path("iD/locales/#{locale}.json") %>") 29: .preauth({ 30: <% token = @user.access_token(ID_KEY) %> 31: url: "<%= request.protocol + request.host_with_port %>", 32: oauth_consumer_key: "<%= token.client_application.key %>", 33: oauth_secret: "<%= token.client_application.secret %>", 34: oauth_token: "<%= token.token %>", app/models/user.rb:239:inaccess_token' app/views/site/id.html.erb:31:in _app_views_site_id_html_erb___1011942628133712304_61090920' app/controllers/site_controller.rb:118:inid' config/initializers/cors.rb:9:in `call'

I think the problem is related to user_tokens and client_applications table. I do not know how to fill them. Could you help me?

Thank you, Laura