How to get release SHA1 from play console and convert it to key hashes for Facebook log-in.

Upload your app to Google Play (signed APK file)
After the app has been submitted and approved, select your app from Google Play Console
Go to Setup->App Integrity->SHA-1 certificate fingerprint
Copy SHA-1 certificate fingerprint

For Google Authentication:

go to your firebase console https://console.firebase.google.com
Select your project

Click on your android app

Click on setting

Click on Add Fingerprint

Paste your SHA1 key (your play console) and click on save

For Facebook Authentication:

Go to your Facebook developer account https://developers.facebook.com/apps
Select your app
Go to Settings -> Basic -> Android
Generate Key Hashes : copy your SHA1 key(your play console) and paste in below website that give you return Key Hashes(Output (base64):) http://tomeko.net/online_tools/hex_to_base64.php
Copy that Key Hashed and paste it as shown below
Don’t forget to click on save changes

This is the method on how you add your release SHA1 to Play console and Keyhashes to the Facebook Developer Console. Once the process has been followed correctly, The Google and Facebook authentication methods should work fine in your released apps.

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