new_contents: import os
  import ConfigParser
  import json
  import syslog
  from jwcrypto import jwk, jwt
  
  from shared import GlobalConfig
  
  
  syslog.openlog(ident='constantina.preferences')
  
  
  class ConstantinaPreferences:
      """
      Set preferences for an individual user.
  
      Constantina's strategy for this is to leave all settings off of the server,
      as well as avoiding any settings that could be used for tracking users
      by their real-world details. So none of these settings have any concept of
      a "user profile".
  
      Indeed, the settings are all stored in a user cookie, which is then signed
      and encrypted using per-account keys stored on the server. This way, the
      cookie's purpose may remain opaque on the client, and the settings cannot be
      changed or sniffed on the server without an active session from the user
      actively occuring. 
      """
      def __init__(self):
          pass
subject: fix preferences.py so that instann test for opaque_instance can be confirmed