docs: def read_message(self, id_):
          """Login required.  Send POST to mark a message as read.  Returns True or raises :class:`exceptions.UnexpectedResponse` if non-"truthy" value in response.
          
          URL: ``http://www.reddit.com/api/read_message/``
          
          :param id\_: full id of message to mark
          """
          data = dict(id=id_)
          j = self.post('api', 'read_message', data=data)
          return assert_truthy(j)