def delete(self, request, *args, **kwargs):
        """Delete auth token when `delete` request was issued."""
        # Logic repeated from DRF because one cannot easily reuse it
        auth = get_authorization_header(request).split()

        if not auth or auth[0].lower() != b'token':
            return response.Response(status=status.HTTP_400_BAD_REQUEST)

        if len(auth) == 1:
            msg = 'Invalid token header. No credentials provided.'
            return response.Response(msg, status=status.HTTP_400_BAD_REQUEST)
        elif len(auth) > 2:
            msg = 'Invalid token header. Token string should not contain spaces.'
            return response.Response(msg, status=status.HTTP_400_BAD_REQUEST)

        try:
            token = self.model.objects.get(key=auth[1])
        except self.model.DoesNotExist:
            pass
        else:
            token.delete()
            signals.user_logged_out.send(
                type(self),
                user=token.user,
                request=request,
            )
        return response.Response(status=status.HTTP_204_NO_CONTENT)
Delete auth token when `delete` request was issued.