Creates a :class:`DMChannel` with this user.

        This should be rarely called, as this is done transparently for most
        people.

async def create_dm(self):
        """Creates a :class:`DMChannel` with this user.

        This should be rarely called, as this is done transparently for most
        people.
        """
        found = self.dm_channel
        if found is not None:
            return found

        state = self._state
        data = await state.http.start_private_message(self.id)
        return state.add_dm_channel(data)