addid checks to import_products action

companies/views.py

@@ -125,11 +125,15 @@ class CompanyViewSet(viewsets.ModelViewSet):
             instance = self.queryset.filter(pk=kwargs['pk']).first()
             # check if it's a shop
             if instance.shop is not True:
-                  return Response('This company is not s shop')
+                  return Response('This company is not a shop')
             # check what platform
             platform = instance.platform
+            if platform is None:
+                  return Response('This company is not registered with any platforms')
             # check required credentials
-
+            credentials = instance.credentials
+            if credentials is None or credentials == {}:
+                  return Response('This company has no registered credentials')
             # execute import
 
             return Response()