fb auth
* this.auth.emailSignUp({email,password})
* this.auth.emailLogin({email,password})
* import * as firebase from 'firebase';
	resetPassword(email: string) {
		var auth = firebase.auth();
		return auth.sendPasswordResetEmail(email)
			.then(() => console.log("email sent"))
			.catch((error) => console.log(error))
	}
* colWithIds$<T>(ref: CollectionPredicate<T>, queryFn?): Observable<any[]> {
	return this.col(ref, queryFn).snapshotChanges().map(actions => {
		return actions.map(a => {
			const data = a.payload.doc.data();
			const id = a.payload.doc.id;
			return { id, ...data };
		});
	});
}
*	this.af.auth.login(
		{ email, password },
		{ provider: AuthProviders.Password, method: AuthMethods.Password }
	)
	.then(() => this.updateUserData())
	.catch(error => console.log(error));