[keycloak-user] Mobile App, native login

Hi all, we're planning to use Keycloak for a project and we're really excited about that. The only thing that makes us thinking a little bit is the authentication flow via native mobile app. I've already read that the authentication via Webview or External Browser, using the Keycloak login page, is the best practice. But we think that our mobile app designers might prefer a native login form with some buttons for social login. How can we do that? 1) For "direct" authentication via username & password we can use the direct access grants mode, is it right? 2) What about the social login part? How can we authenticate users when we receive the access token from an external identity providers such as Facebook? We need to implement our custom Authenticators and then deploy them with Keycloak? I apologize because i know that this question has been asked a lot of times, but we haven't been able to figure it out. Thank you very much, have a nice day, Matteo