def get(self, request, format=None):
        users = self.queryset
        serializer = UserSerializer(users, many=True)
        return Response(serializer.data) 

def post(self, request, format=None):
        serializer = UserSerializer(data=request.DATA)
        if serializer.is_valid():
            serializer.save()
            return Response(serializer.data, status=status.HTTP_201_CREATED)
        return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST) 

def put(self, request, uid, format=None):
        user = self._get_object(uid)
        serializer = UserSerializer(user, data=request.DATA)
        if serializer.is_valid():
            serializer.save()
            return Response(serializer.data)
        return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST) 

def me(self, request, *args, **kwargs):
        if request.user.is_authenticated():
            if 'expand_accounts' in request.GET:
                request.user.all_accounts = request.user.accounts_set.all()
            if 'expand_links' in request.GET:
                request.user.all_links = request.user.links.all()
            serializer = serializers.UserSerializer(request.user, context={'request':request})
            return Response(serializer.data)
        raise PermissionDenied()