Firebase phone auth problem

[Hopheylalal]

when i past this

signingConfigs {
release {
keyAlias keystoreProperties['keyAlias']
keyPassword keystoreProperties['keyPassword']
storeFile keystoreProperties['storeFile'] ? file(keystoreProperties['storeFile']) : null
storePassword keystoreProperties['storePassword']
}
}
buildTypes {
release {
signingConfig signingConfigs.release
}
}

Firebase phone auth do not working with error:

I/flutter (18939): [firebase_auth/missing-client-identifier] This request is missing a valid app identifier, meaning that neither SafetyNet checks nor reCAPTCHA checks succeeded. Please try again, or check the logcat for more details.