Could we define them with some const variable and not C #define?

I find it a bit unclear that we are using true/false to device between content and notifications accounts when reading the code. I wonder if it wouldn't be better to just allow the programmer to pass the ID which is defined as a constant, similar to what we use for secure store:

CommSecureStore::set(CommSecureStore::userID, "");

But up to you, I don't think it matters a lot.

I also think using ID instead of flag makes more sense