title: flutter firebase phone auth error a safety net token was passed but no matching sha-256 was registered in the firebase console
body: <p>I register sha-1 release , debug key on firebase
  and I All did firebase register tutorial</p>
  <p>but I got this message when I call verifyPhoneNumber();</p>
  <p>in the verificationFailed: (AuthException exception) {exception.message};</p>
  <pre><code>This app is not authorized to use Firebase Authentication.
  Please verify that the correct package name and SHA-1 are configured
   in the Firebase Console.
  [ 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 ] 
  
  </code></pre>
  <p>I thought i don't need to register sha256 if I register sha1
  but it says like that</p>
  <p>what is this reason ,
  how can i solve this problem??</p>