Login page in headless mobile app

I’m almost done with my mobile app, all works perfectly with Wix CMS, but the login screen redirect to Wix web login, is there a way to make the login and sign up from the app? Without redirecting to Wix web login.

I tried to customize the login page on Wix editor, but still I wish I can get my customers login from the app without redirect to web or web I frame.

Thanks