You can simply do it, please follow the below steps.
- Go play console and select your app.
- Inside the 'Version' section, click the 'Application Integrity' tab.
- Get SHA1
-- Finally, generate your hash code using the following line of code
$ echo 00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00 | xxd -r -p | openssl base64
https://stackoverflow.com/questions/54274593/how-to-compute-key-hash-for-facebook-from-deployment-cert-der-file