Trying to Authorise a user account already authorised by active user causes error

[baseonmars]

Suspect this is caused by not returning in the action meothd after the redirect in redirect_if_account_already_owned

ActionController::DoubleRenderError in Twitter usersController#callback

Render and/or redirect were called multiple times in this action. Please note that you may only call render OR redirect, and at most once per action. Also note that neither redirect nor render terminate execution of the action, so if you want to exit an action after redirecting, you need to do something like "redirect_to(...) and return".
RAILS_ROOT: /Users/danyo/dev/birdherd

Application Trace | Framework Trace | Full Trace
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/base.rb:1127:in redirect_to_full_url' /usr/local/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/base.rb:1114:inredirect_to'
/Users/danyo/dev/birdherd/app/controllers/twitter_users_controller.rb:64:in `callback'