adding google sign in to Android

Wow, seems like thinks have changed dramatically since Firebase integrated with google. Ok, if you've already gone through the previous steps in documentation - it means that you already have a google sign-in project.

1. Now navigate to: https://console.firebase.google.com and add the google project you've created (https://prnt.sc/j4rs2n).

2. Enable Google authentication https://prnt.sc/j4s86g

3. Go to project settings https://prnt.sc/j4rsy9

4. Add to Android app https://prnt.sc/j4rtue

5. Fill out the form which will pop up (every field has tooltips explaining what to do to get necessary data)

6. Register app

7. On the next step click the button ''Download google-services.json"

We'll update the docs ASAP

Anton