check and return error if token auth fails (mixin only)

portal/views/__init__.py

@@ -19,7 +19,11 @@ class TokenLoginMixin(LoginRequiredMixin):
     def dispatch(self, request, *args, **kwargs):
         if not request.user.is_authenticated:
             user = authenticate(request)
-            login(request, user)
+            if user:
+                login(request, user)
+            else:
+                return JsonResponse({'error': _('Malformed authorization header or invalid token')}, status=500)
+               
         return super().dispatch(request, *args, **kwargs)