django.contrib.auth.models.User.DoesNotExist: User matching query does not exist

I have error like in title when I'm trying to run test, I dont know whats going on but my testUser dont work properly, It's funny because i have identical test user in another project and there everything is ok.

test_api.py

class TaskDetailViewAPI(APITestCase):
def setUp(self):
    self.client = APIClient()
    self.user = User.objects.create_user(username='test', password='test123')
    self.user.save()

@classmethod
def setUpTestData(cls):
    user = User.objects.get(id=1)
    Task.objects.create(name='TestTask', user=user, status='NEW', date=date(2019, 4, 9), description='This is test')

def test_access_to_view_logged(self):
    task= Task.objects.get(id=1)
    login = self.client.login(username='test', password='test123')
    self.assertTrue(login)

And this is test from another project where everything works fine

class CreateCommentAPI(APITestCase):
def setUp(self):
    self.client = APIClient()
    self.user = User.objects.create_user(username='test', password='test123')
    self.user.save()

@classmethod
def setUpTestData(cls):
    Category.objects.create(name='PC', slug='pc')
    Product.objects.create(
        category=Category.objects.get(id=1),
        name='Laptop', slug='laptop',
        description='here is description',
        photo=SimpleUploadedFile("file.jpeg", b"file_content", content_type="image/jpeg"),
        price=1999, available='available'
    )

def test_access_to_view_logged(self):
    product = Product.objects.get(id=1)
    login = self.client.login(username='test', password='test123')
    response = self.client.get(reverse('add_comments', kwargs={'id': product.id}))
    self.assertTrue(login)
    self.assertEqual(response.status_code, 200, f'expected Response code 200, instead get {response.status_code}')