Hi, I'm an Android Developer, I have created some of the applications in Android and nowadays I'm working on a Chat Application in which I'm using Firebase. I can include the sign in Option in your app. Firebase provides many authentication methods Facebook, Gmail, Cell No, Anonymous. You can discuss with me anything you want or you can check my portfolio as well.
It would be the pleasure to work with you, Looking forward to hearing from you.
Thank You,
Rakesh Mandhan