code: def get_student_email(cmd_args, endpoint=''):
      
      log.info("Attempting to get student email")
      if cmd_args.local:
          return None
      access_token = authenticate(cmd_args, endpoint=endpoint, force=False)
      if not access_token:
          return None
      try:
          return get_info(cmd_args, access_token)['email']
      except IOError as e:
          return None
docs: Attempts to get the student's email. Returns the email, or None.