Signing In when "Automatically Register" is disabled does not function properly

When the setting for the variable "twitter_signin_register" is false, a record does not get placed into the twitter_account table.

To Recreate

• Set the setting Automatically register new users at /admin/settings/twitter/signin to false
• Logout
• Click the "Signin with Twitter" button
• Auth with twitter, return to site, fill out user registration form
• The newly created Drupal user account is not tied to the twitter account we just authenticated

I have patched the module locally to make a call to twitter_account_save on the user insert, and will attach it here