Fix wrong field.

src/services/views.py

@@ -84,7 +84,7 @@ def service_subscribe(request: HttpRequest, service_slug: str) -> HttpResponse:
         if form.is_valid():
             data = form.cleaned_data
             service_access = ServiceAccess(
-                user=request.user,
+                member=request.user,
                 service=service.slug,
                 subscription_data=data,
             )