Add email password Authentication through Firebase

Currently only google auth is supported thorugh Firebase, but we need to change to add support for email password authentication with verification.

Web: https://firebase.google.com/docs/auth/web/email-link-auth?authuser=0
Mobile: https://firebase.google.com/docs/auth/android/email-link-auth?authuser=0
iOS: https://firebase.google.com/docs/auth/ios/email-link-auth?authuser=0