I’m trying to use two different external services for authentication purposes.
I can easily authenticate user, with ITCH.io authentication (there are some examples so its simple),
and I also created authenticate method for GOG auth.
So I have two accounts that uses two different authentication methods.
But how I can link those two accounts into one?
How not override one authentication with other?
DeviceIDs field is array with many ids of single user. But customID is not. How to work with that?