Ionic 3 & firestore

Hi, All
I am new user in ionic.
I would like to use ionic 3 lazy loading and Firebase cloud firestore. I found many tutorials Ionic 3 firestore CURD. But I’m not found Firebase user authenticating data to firestore.
In firebase authorization only create email, password and user uid. How to create firebase authentication data and other user data(username, gender, …)in firestore. Thanks All!