title: unknown status code: 17028 A safety_net_token was passed, but no matching SHA-256 was registered
body: <p>unknown status code: 17028 A safety_net_token was passed, but no matching SHA-256 was registered in the Firebase console. Please make sure that this application’s packageName/SHA256 pair is registered in the Firebase Console.</p>
  <p>hello there, i m facing this issues while developing application, i have tried to fix and these are the steps i have done so far but the same result:</p>
  <ul>
  <li>correctly configured the firebase and my flutter application by using the steps on firebase</li>
  <li>i have signed my app and added the signing key both debug and release keys, both SHA-1 key and SHA-256 key</li>
  <li>I have enabled Android Verification in google cloud page also</li>
  <li>i have enabled the authentication provider, phone authentication enabled, password/email enabled</li>
  </ul>
  <p>in addition to that when i use testing phone number i added to the console and the otp code i insert, my app works perfectly
  but when trying to authenticate the phone using  other un registered phone numbers it keeps showing me error.</p>
  <p>i have cheched flutter doctor -v it has no error
  also execute flutter commands there is nothing error related thing on the result. I have used the following firebase plugins</p>
  <p>firebase_auth: ^0.18.4+1
  firebase_core: ^0.5.3
  cloud_firestore: ^0.14.4
  firebase_admob:
  firebase_messaging: ^7.0.3
  firebase_storage: ^5.2.0</p>
  <p>any help from you would be appreciated</p>