<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def pause(self, device):
 """ Pause the given device. Args: device (str):
 Device ID. Returns: dict: with keys ``success`` and ``error``. """

        resp = self.post('pause', params={'device': device},
                         return_response=True)
        error = resp.text
        if not error:
            error = None
        return {'success': resp.status_code == requests.codes.ok,
                'error': error}