title: Firebase OTP not working after uploading flutter app to Playstore
body: <p>I have made a flutter app with firebase with OTP verification, it is working fine in debug mode and releasing <code>APK</code>. But after uploading to playstore the phone doesn't receive an OTP message. I have added the <code>SHA - 1</code> and <code>SHA - 256</code> keys from the play console to firebase project settings, still not working. Is there a time delay or something before the change is reflected in the application after updating the app in playstore (Internal testing)?</p>