Select Android or IOS.
Enter your key hash or keystore fingerprint. To get this fingerprint, run the following command and copy its output:
keytool -exportcert -alias <RELEASE_KEY_ALIAS> -keystore <RELEASE_KEY_PATH> | openssl sha1 -binary | openssl base64
Keytool should be under: \bin
The fingerprint is unique to the keystore so the project may not work when compiled on another machine.