add new model and change offer models

core/apps/counterparty/urls.py

@@ -0,0 +1,12 @@
+from django.urls import path, include
+
+from core.apps.counterparty.views import counterparty as cp_views
+
+
+urlpatterns = [
+    path('counterparty/', include(
+        [
+            path('list/', cp_views.CounterpartyListApiView.as_view()),
+        ]
+    ))    
+]