old_contents: from google.appengine.ext import db
  
  class User(db.Model):
      ''' IP addresses that have accessed the promo '''
      email = db.StringProperty()
      referer = db.IntegerProperty()
      referal_id = db.IntegerProperty()
      created = db.DateTimeProperty(auto_now_add=True)
      modified = db.DateTimeProperty(auto_now=True)
  
  def create_user(email, referer):
      ''' Add a new user to the database. If there is no referer, the code will be 0 '''
      new_user = User()
      new_user.email = email
      new_user.referer = referer
  
      # Get the newest user and increment the id counter
      query = db.Query(User)
      query.order('-created')
      if query.count(limit=1) > 0:
          new_user.referal_id = query[0].referal_id + 1
      else:
          new_user.referal_id = 1
      new_user.put()
  
      return new_user.referal_id
  
  def delete_user(email):
      ''' Delete a user from the database '''
      user_query = db.Query(User)
      user_query.filter('email =', email)
      db.delete(user_query.get())
  
  def get_user(email):
      ''' Get a user by email '''
      user_query = db.Query(User)
      user_query.filter('email =', email)
      return user_query.get()
  
  def get_user_by_refid(refid):
      ''' Get a user by their referal id '''
      user_query = db.Query(User)
      user_query.filter('referal_id =', refid)
      return user_query.get()
  
  def does_user_exist(email):
      ''' Get a boolean if the user exists in the database '''
      user = get_user(email)
      if user is None:
          return False
      return True
  
  def get_referal_count(refid):
      ''' Get the number of referals for a given user '''
      ref_query = db.Query(User)
      ref_query.filter('referer =', refid)
      return ref_query.count()
  
  def get_user_count():
      ''' Get the total number of users '''
      user_query = User.all()
      return user_query.count()
  
  def get_all_users():
      ''' Get all of the user emails '''
      user_query = User.all()
      return user_query.run()
new_contents: from google.appengine.ext import db
  
  class User(db.Model):
      ''' IP addresses that have accessed the promo '''
      email = db.StringProperty()
      referer = db.IntegerProperty()
      referal_id = db.IntegerProperty()
      created = db.DateTimeProperty(auto_now_add=True)
      modified = db.DateTimeProperty(auto_now=True)
  
  def create_user(email, referer):
      ''' Add a new user to the database. If there is no referer, the code will be 0 '''
      new_user = User()
      new_user.email = email
      new_user.referer = referer
  
      # Get the newest user and increment the id counter
      query = db.Query(User)
      query.order('-created')
      if query.count(limit=1) > 0:
          new_user.referal_id = query[0].referal_id + 1
      else:
          new_user.referal_id = 1
      new_user.put()
  
      return new_user.referal_id
  
  def delete_user(email):
      ''' Delete a user from the database '''
      user_query = db.Query(User)
      user_query.filter('email =', email)
      db.delete(user_query.get())
  
  def get_user(email):
      ''' Get a user by email '''
      user_query = db.Query(User)
      user_query.filter('email =', email)
      return user_query.get()
  
  def get_user_by_refid(refid):
      ''' Get a user by their referal id '''
      user_query = db.Query(User)
      user_query.filter('referal_id =', refid)
      return user_query.get()
  
  def does_user_exist(email):
      ''' Get a boolean if the user exists in the database '''
      user = get_user(email)
      if user is None:
          user_caps = get_user(email.title())
          if user_caps is None:
              return False
          else:
              return True
      return True
  
  def get_referal_count(refid):
      ''' Get the number of referals for a given user '''
      ref_query = db.Query(User)
      ref_query.filter('referer =', refid)
      return ref_query.count()
  
  def get_user_count():
      ''' Get the total number of users '''
      user_query = User.all()
      return user_query.count()
  
  def get_all_users():
      ''' Get all of the user emails '''
      user_query = User.all()
      return user_query.run()
subject: Change user existing check