code: def relogin(self):
          
          if self.relogin_available:
              self.login(self.username, '', self.login_key)
docs: Login without needing credentials, essentially remember password.
          The :attr:`login_key` is acquired after successful login and it will be
          automatically acknowledged. Listen for the ``new_login_key`` event.
          After that the client can relogin using this method.
  
          .. note::
              Only works when :attr:`relogin_available` is ``True``.
  
          .. code:: python
  
              if client.relogin_available: client.relogin()
              else:
                  client.login(user, pass)