How do I authenticate with SessionAuthentication?

I’m having difficulty grasping how to authenticate with Django Rest Framework using solely SessionAuthentication in conjunction with the IsAuthenticated permission. Using Postman to test an API endpoint, I’m getting the error

Forbidden: /api/v1/questions/1/
"PUT /api/v1/questions/1/ HTTP/1.1" 403 5

    "detail": "Authentication credentials were not provided."

When IsAuthenticated is commented out, and another request is made to endpoint, request.user == AnonymousUser. Ultimately, I would like to know is how setup an API request through Postman where the request will be authenticated and recognize the User credentials. I’m having trouble find examples where just SessionAuthentication is used.

class UserQuestionVoteView(APIView):

    renderer_classes = [JSONRenderer, ]
    parser_classes = [JSONParser, ]
    permission_classes = [IsAuthenticated, ]
    authentication_classes = [SessionAuthentication, ]
    throttle_classes = [ScopedRateThrottle, ]
    throttle_scope = "voting"

    def put(self, request, id):
        import pdb; pdb.set_trace()
        account = UserAccount.objects.get(user=request.user)
        question = Question.objects.get(id=id)
        vote =['vote']
            stored_vote = QuestionVote.objects.get(
                vote=vote, account=account, question=question
            serializer = QuestionVoteSerializer(stored_vote,
        except QuestionVote.DoesNotExist:
            serializer = QuestionVoteSerializer(
            if serializer.is_valid(raise_exception=True):
                question_vote =
                vote_tally = question.votes.count()
                return Response(data={
                    'tally': vote_tally
            return Response(serializer.errors)
class TestQuestionDuplicateUpvote(APITestCase):
    '''Verify that a client is informed that they already
    voted on a question posted.'''

    def setUpTestData(cls):
        cls.user = User.objects.create_user('Mock', password="mocksecret")
        cls.user_account = UserAccount.objects.create(user=cls.user)
    def test_user_upvote_posted_question(self):
        self.client.login(username="Mock", password="mocksecret")
        response = self.client.put(
            reverse("questions_api:vote", kwargs={"id": 1}),
            data = {'vote': 'upvote'}
        new_vote_tally = self.question.votes.count()
        self.assertEqual(response.status_code, 400)
        self.assertEqual(['vote'][0], "You have already voted")