App rejection due to 4.8 Guideline

Hello everyone,

We have an app that was already published on AppStore using a third-party login (google login). However, we offer a client app for users that create their account from our web based access. It is not possible to create an account neither with your email or with other third party sign up using the mobile app.

Even with this scenario, Apple reviewers rejected our app after a small bug fix release suggesting we should include Apple sign in option.

Any thoughts about that? We think it’s a big misunderstood of our app business..