old_contents: from google.appengine.api import users
  from google.appengine.ext import db
  
  from model import User
  
  @db.transactional
  def create_user(google_user):
      user = User(
          google_user=google_user
      )
      user.put()
      return user
  
  def get_current_user():
      google_user = users.get_current_user()
      user = get_user_model_for(google_user)
      return user
  
  def get_user_model_for(google_user=None):
      return User.all().filter('google_user =', google_user).get()
  
  def get_user_model_by_id_or_nick(id_or_nick):
      if id_or_nick.isdigit():
          return User.get_by_id(int(id_or_nick))
      else:
          return User.all().filter('nickname_lower = ', id_or_nick.lower()).get()
new_contents: from google.appengine.api import users
  from google.appengine.ext import db
  
  from model import User
  
  latest_signup = None
  
  @db.transactional
  def create_user(google_user):
      global latest_signup
      user = User(
          google_user=google_user
      )
      user.put()
      latest_signup = user
      return user
  
  def get_current_user():
      google_user = users.get_current_user()
      
      if latest_signup != None and google_user == latest_signup.google_user:
          return latest_signup
          
      user = get_user_model_for(google_user)
      return user
  
  def get_user_model_for(google_user=None):
      return User.all().filter('google_user =', google_user).get()
  
  def get_user_model_by_id_or_nick(id_or_nick):
      if id_or_nick.isdigit():
          return User.get_by_id(int(id_or_nick))
      else:
          return User.all().filter('nickname_lower = ', id_or_nick.lower()).get()
subject: Fix bug where user could not be found