validation for pos device - some changes in pos device models

apps/pos_device/pos/api/v1/urls.py

@@ -0,0 +1,10 @@
+from django.urls import path, include
+from rest_framework.routers import DefaultRouter
+from .viewsets.device import TestViewSet
+
+router = DefaultRouter()
+router.register('test', TestViewSet, basename='test')
+
+urlpatterns = [
+    path('v1/', include(router.urls))
+]