old_contents: """ Defines the data model for the backend. """
  
  
  def get_user(user_handle, is_id = True):
      """
      Retrieve user object by handle
      """
      pass
  
  
  def add_user(user_handle, pass_hash):
      """
      1. Create ID
      2. Store in DB
      """
      pass
  
new_contents: """ Defines the data model for the backend. """
  
  
  def get_user(user_handle, is_id = True):
      """
      Retrieve user object by handle
      """
      pass
  
  
  def add_user(user_handle, pass_hash):
      """
      1. Create ID
      2. Store in DB
      """
      pass
  
  
  def ingest_main_input():
      """
      Handles ingest text and label data into hdfs
      """
      pass
  
subject: add -stub for ingesting text and label data.