In this case, you will probably want to do a CRUD (Create, Read, Update and Delete).
This video shows you how to do.
Considering that you already have integrations with firebase, just go to your project page in firebase, in the database tab, and create a database.
Then using the Angularfirestore:
import {AngularFirestore} from '@angular/fire/firestore';
Creates methods for adding and searching user:
interface User {
nome?: string;
sobrenome?: string;
dataNascimento?: string;
celular?: string;
}
constructor(private afs: AngularFirestore) {
var user:User = {
nome: "Nome",
sobrenome: "Sobrenome",
dataNascimento: "Data de Nascimento",
celular: "Número de celular",
};
this.afs.collection<User>('Users').add(user);
}