@strategy()
@api_view(['POST'])
def register_by_access_token(request, backend):
    token = request.DATA.get('access_token')
    try:
        user = request.strategy.backend.do_auth(token)
        login(request, user)
        token, created = Token.objects.get_or_create(user=user)
        return Response({"token":token.key, "username":user.username}, status=status.HTTP_201_CREATED)
    except Exception as e:
        return Response({"error":str(e)}, status=status.HTTP_400_BAD_REQUEST)