::
        
            GET /:login/machines/:id?credentials=True
        
        :Returns: known login-password pairs for the machine
        :rtype: :py:class:`dict`
        
        Provisionally re-fetch the machine information with the credentials 
        flag enabled.

def credentials(self):
        """
        ::
        
            GET /:login/machines/:id?credentials=True
        
        :Returns: known login-password pairs for the machine
        :rtype: :py:class:`dict`
        
        Provisionally re-fetch the machine information with the credentials 
        flag enabled.
        """
        if not self._credentials:
            self.refresh(credentials=True)
        return self._credentials