code: def get_auth(sock, dname, protocol, host, dno):
      
  
      modname = _auth_mods.get(platform, _default_auth_mod)
      mod = _relative_import(modname)
      return mod.get_auth(sock, dname, protocol, host, dno)
docs: auth_name, auth_data = get_auth(sock, dname, protocol, host, dno)
  
      Return authentication data for the display on the other side of
      SOCK, which was opened with DNAME, HOST and DNO, using PROTOCOL.
  
      Return AUTH_NAME and AUTH_DATA, two strings to be used in the
      connection setup request.