class UserSerializer(serializers.ModelSerializer):

    def create(self, validated_data):
        user = get_user_model().objects.create(
            username=validated_data['username']
        )
        user.set_password(validated_data['password'])
        user.save()
        return user


    class Meta:
        model = UserModel
        fields = ('id', 'username', 'deliveries', 'password')

class UserList(APIView):

    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.data, status=status.HTTP_400_BAD_REQUEST)

http -v POST http://127.0.0.1:8000/user/user-list/ username="Rudy" password="12345"