When we persist the user in the metadata Realm, we use the string representation of the provider but we have the same representations for apiKey and serverApiKey:

https://github.com/realm/realm-core/blob/7b087008a19773f1bb92324d410f9e70db17fca9/src/realm/object-store/sync/app_credentials.cpp#L33-L34

Is this intentional? This has the unpleasant side effect that:

enum_from_provider_type(provider_type_from_enum(AuthProvider::SERVER_API_KEY)) != AuthProvider::SERVER_API_KEY;

And if you log in a user with a server api key credential, their provider will instead be API_KEY.